Public Family Trees/Medici/Cosimo I de' Medici
1519 - 1574 · Male · Florence, Republic of Florence
Son of Giovanni de' Medici (dalle Bande Nere) and Maria Salviati
7
Generation
15
Ancestors
8
Descendants
2
Children
1
Marriages
Cosimo I de' Medici (1519-1574) became Duke of Florence in 1537 at eighteen, after the assassination of Alessandro de' Medici left the senior Medici line without an heir, and was chosen by the city's council expecting him to be a pliable figurehead. He instead proved a shrewd and effective ruler, consolidating personal power, defeating Florence's republican exiles at the Battle of Montemurlo, conquering the rival Rep…
Born1519
Born to Giovanni de' Medici (dalle Bande Nere), Maria Salviati.
Family
A partnership that connects two branches of the Medici family.
Next Generation
2 children recorded in this branch.
Legacy
A defining role in the story of the Medici family.
Died1574
The close of a life whose connections continue through the family record.
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Gen 1 · 1360 - 1429
Giovanni di Bicci de' Medici (1360-1429) was a Florentine banker who founded the Medici Bank around 1397, building it into one of the largest and most respected financial institutions in Europe through careful management and close ties to the papacy. He avoided the ostentation of rival families, cultivated a reputation for civic modesty, and served in senior offices of the Florentine republic without seeking overt political dominance. His sons Cosimo and Lorenzo the Elder inherited both the bank and its fortune, and it was Cosimo who transformed the family's wealth into lasting political power. Giovanni is regarded as the founder of the Medici dynasty, laying the financial foundation on which four centuries of Medici influence in Florence and beyond were built.
Gen 2 · 1389 - 1464
Cosimo de' Medici (1389-1464), known as Cosimo the Elder and later honored as Pater Patriae ('Father of the Fatherland'), transformed his father Giovanni di Bicci's banking fortune into effective political control of the Republic of Florence. Though he held no formal title beyond ordinary republican offices, he dominated the city's government from behind the scenes for three decades through alliances, patronage, and careful management of public opinion. A discerning patron of the arts and humanist learning, he funded Brunelleschi's architecture and Donatello's sculpture, and built the Medici Bank into the most powerful financial institution in Europe. His grandson Lorenzo the Magnificent would later be seen as completing the political and cultural project Cosimo began.
Gen 2 · 1395 - 1440
Lorenzo de' Medici (1395-1440), called Lorenzo the Elder to distinguish him from his more famous great-nephew, was the younger son of Giovanni di Bicci de' Medici and the brother of Cosimo de' Medici. He worked alongside Cosimo in the family bank but did not seek the same political prominence in Florence. His son Pierfrancesco de' Medici founded what became known as the 'Popolano' or junior branch of the family, a line that later produced Giovanni dalle Bande Nere and, through him, Cosimo I, the first Grand Duke of Tuscany. Though less celebrated than his brother's descendants, Lorenzo the Elder's branch ultimately inherited rule over Florence when the senior line failed.
Gen 3 · 1416 - 1469
Piero di Cosimo de' Medici (1416-1469), known as Piero the Gouty for the severe arthritis that afflicted him, was the son of Cosimo de' Medici and Contessina de' Bardi and led Florence for five years after his father's death in 1464. Despite chronic illness that often confined him to bed, he survived a conspiracy against Medici rule in 1466 and preserved the family's dominant position in the city. He married Lucrezia Tornabuoni, a poet in her own right, and together they raised Lorenzo the Magnificent and Giuliano de' Medici, ensuring a smooth succession of Medici leadership. He was also a discerning collector who continued his father's patronage of Florentine artists.
Gen 3 · 1430 - 1476
Pierfrancesco de' Medici (1430-1476) was the son of Lorenzo de' Medici the Elder and grandson of Giovanni di Bicci, heading the junior, 'Popolano' branch of the family descended from Cosimo the Elder's brother. He and his branch held a significant share of the family bank's capital but, unlike his cousins descended from Cosimo, largely stayed out of the front rank of Florentine politics during his lifetime. His two sons, Lorenzo and Giovanni di Pierfrancesco, both called 'il Popolano', continued the branch; Giovanni's marriage to Caterina Sforza produced Giovanni dalle Bande Nere, whose own son Cosimo I would eventually inherit rule over Florence after the senior Medici line died out in the sixteenth century.
Gen 4 · 1449 - 1492
Lorenzo de' Medici (1449-1492), known as Lorenzo the Magnificent, was the de facto ruler of Florence from 1469 until his death and is the figure most closely associated with the Medici name. Grandson of Cosimo de' Medici and son of Piero the Gouty and Lucrezia Tornabuoni, he survived the Pazzi conspiracy of 1478, in which his brother Giuliano was murdered, and went on to steer Florence through decades of shifting Italian alliances with considerable diplomatic skill. An accomplished poet himself, he was the leading patron of the High Renaissance, supporting Michelangelo, Botticelli, and the Platonic Academy of Marsilio Ficino. His sons included Pope Leo X and Giuliano, Duke of Nemours, and his granddaughter was Catherine de' Medici, future queen of France.
Gen 4 · 1453 - 1478
Giuliano de' Medici (1453-1478) was the younger brother of Lorenzo the Magnificent and co-ruler of Florence alongside him. On 26 April 1478 he was stabbed to death in Florence Cathedral during the Pazzi conspiracy, a plot by the rival Pazzi family and allies within the papacy to overthrow Medici rule; Lorenzo survived a simultaneous attack and moved swiftly to suppress the conspirators. Giuliano was admired for his athleticism and courtly manner and was celebrated in Renaissance poetry, including works by Poliziano. Shortly after his death, a son, Giulio de' Medici, was born to his mistress; Giulio was raised within the Medici household and later became Pope Clement VII.
Gen 5 · 1472 - 1503
Piero de' Medici (1472-1503), called Piero the Unfortunate, succeeded his father Lorenzo the Magnificent as head of the family in 1492 but lacked his father's political skill. Facing the French invasion of Italy under Charles VIII in 1494, he agreed to humiliating terms that ceded Florentine fortresses without consulting the city's government, provoking a popular uprising that expelled the Medici from Florence. He spent the rest of his life in exile attempting unsuccessfully to regain power, and died in 1503 during a military campaign in southern Italy, having never recaptured Florence. His son Lorenzo II, Duke of Urbino, later restored the family to power, and his granddaughter was Catherine de' Medici.
Gen 5 · 1475 - 1521
Giovanni de' Medici (1475-1521) was the second son of Lorenzo the Magnificent, made a cardinal in his teens through his father's influence with the papacy, and elected Pope Leo X in 1513, becoming the first Medici pope. His pontificate was marked by lavish patronage of art and architecture in Rome, continuing the Medici tradition of cultural sponsorship, but also by the sale of indulgences that helped provoke Martin Luther's protest in 1517 and the start of the Protestant Reformation. He restored Medici rule in Florence after the family's earlier expulsion and used his position to advance Medici family interests across Italy. He died in 1521 without legitimate children, and his cousin Giulio later became Pope Clement VII.
Gen 6 · 1492 - 1519
Lorenzo de' Medici (1492-1519), grandson and namesake of Lorenzo the Magnificent, was made Duke of Urbino in 1516 by his uncle Pope Leo X after a campaign to seize the duchy from its ruling family. He governed Florence on behalf of the Medici papacy and married Madeleine de la Tour d'Auvergne, a French noblewoman, in 1518. Both parents died within weeks of each other in 1519, shortly after the birth of their only child, Catherine de' Medici, who was raised as a ward of the family and later became queen of France. Niccolo Machiavelli dedicated The Prince to Lorenzo, though the two are not known to have had a close relationship. He is traditionally identified as the father of Alessandro de' Medici, first Duke of Florence.
Gen 7 · 1510 - 1537
Alessandro de' Medici (1510-1537) became the first Medici to hold the hereditary title Duke of Florence, installed in 1532 by his relative Pope Clement VII with the backing of Emperor Charles V, whose illegitimate daughter Margaret of Austria he married. He is traditionally recorded as the son of Lorenzo de' Medici, Duke of Urbino, though some historians believe his father was actually Clement VII himself; his mother is generally identified as a servant in the Medici household. His autocratic rule proved unpopular, and in 1537 he was assassinated by his cousin Lorenzino de' Medici. Having no legitimate heir, he was succeeded by Cosimo I, from the junior branch of the family, ending the senior line's direct rule over Florence.
The House of Glücksburg is the reigning royal house of Denmark and Norway and the former royal house of Greece, a branch of the ancient House of Oldenburg whose modern members all descend from King Christian IX of Denmark (1818 to 1906) and his wife Louise of Hesse-Kassel. Through the marriages of their six children, a minor ducal family from the Danish-German borderland became the common ancestor of monarchs in Copenhagen, Oslo and Athens, of a British queen consort, of a Russian empress, and of Prince Philip, Duke of Edinburgh. ## Origins The house takes its name from Glücksburg, a small castle town in Schleswig, and belongs to the Schleswig-Holstein-Sonderburg-Glücksburg line of the House of Oldenburg, which had held the Danish throne since 1448. Christian IX was a prince of that cadet branch with no expectation of ruling until the childless Frederik VII made the Danish succession an open European question. Christian succeeded him in 1863, and within months his second son was elected King of the Hellenes as George I, planting the family in Greece for 110 years. In 1905 his grandson Prince Carl of Denmark accepted the Norwegian throne as Haakon VII, giving Norway its own dynasty after centuries of union with Denmark and then Sweden. ## Notable members Christian IX was nicknamed the father-in-law of Europe: his daughter Alexandra married Edward VII of the United Kingdom, and his daughter Dagmar became Empress Maria Feodorovna of Russia, mother of Nicholas II. The Danish line runs through Christian X, Frederik IX and Queen Margrethe II, a trained archaeologist and illustrator who reigned from 1972 until her abdication in 2024, to her son King Frederik X and Queen Mary. The Norwegian line runs from Haakon VII and Queen Maud through Olav V, an Olympic sailing champion, to King Harald V and Crown Prince Haakon. The Greek line produced Constantine I, Paul, Constantine II and Queen Anne-Marie, Queen SofÃa of Spain, and Prince Andrew's son Philip, consort to Elizabeth II for 73 years. ## Significance No other western dynasty connects as many surviving monarchies in a single documented lineage. Two of Europe's ten reigning royal families, Denmark and Norway, are Glücksburg in the male line, and the house also sits in the ancestry of the British and Spanish royal families. Its history traces the transformation of European monarchy itself: from the dynastic matchmaking of the 1860s, through the loss of the Russian and Greek thrones, to the constitutional, publicly accountable monarchies of modern Scandinavia. | Fact | Details | | --- | --- | | House name | Schleswig-Holstein-Sonderburg-Glücksburg, a branch of the House of Oldenburg | | Founding figure of the modern house | Christian IX of Denmark (1818 to 1906) | | Ancestral seat | Glücksburg Castle, Schleswig | | Thrones held | Denmark (1863 to present), Greece (1863 to 1973), Norway (1905 to present) | | Current heads of state | Frederik X of Denmark, Harald V of Norway | | Best-known member abroad | Prince Philip, Duke of Edinburgh (1921 to 2021) | | Nickname of its founder | The father-in-law of Europe |
The House of Hohenzollern is the German dynasty that ruled Brandenburg from 1415, held the Prussian crown from 1701, and gave Germany its three emperors between 1871 and the fall of the monarchy in 1918. This tree follows the senior Prussian line in one unbroken descent, from Frederick William the Great Elector, through the kings of Prussia and the German Emperors, down to Georg Friedrich, Prince of Prussia, the present head of the house. ## Origins The family takes its name from Hohenzollern Castle on a hill in the Swabian Alb, where a line of counts is recorded from the eleventh century. A Swabian Zollern married into the burgraviate of Nuremberg in 1192, and the Franconian branch that grew from it spent two centuries accumulating lands and credit with the Holy Roman Emperors. The decisive moment came in 1415, when Emperor Sigismund invested Frederick VI of Nuremberg as Elector of Brandenburg in return for his political and financial support. The Duchy of Prussia, a separate inheritance lying outside the Empire, passed to the Brandenburg electors in 1618, and Frederick William, the Great Elector, welded the two into a single functioning state after the devastation of the Thirty Years' War. ## Notable members Frederick I turned the electorate into a kingdom in 1701. His son Frederick William I, the Soldier King, built the army and the treasury that his own son, **Frederick the Great**, used to seize Silesia and to make Prussia a European power, while also composing music, building Sanssouci and corresponding with Voltaire. **Queen Louise** became the emotional centre of Prussian resistance to Napoleon. **Wilhelm I**, with Otto von Bismarck as his minister president, was proclaimed German Emperor at Versailles in 1871. His son **Frederick III** and the liberal English princess he married, Victoria, daughter of Queen Victoria, reigned for only ninety nine days. **Wilhelm II**, the last Kaiser, abdicated in 1918 and died in Dutch exile in 1941. ## Significance No other German family shaped the modern state so directly. Hohenzollern rulers created the Prussian civil service, compulsory schooling and the general staff, sponsored the Berlin academies and the Humboldt university model, and then used Prussian power to unify Germany around themselves. The monarchy ended with the revolution of November 1918, but the house continues as a private family: the headship passed from Wilhelm II to his eldest son, then to Louis Ferdinand, and in 1994 to Georg Friedrich, whose own father and uncles are part of the succession story told in this tree. ## Quick facts | Fact | Details | |---|---| | Family name | Hohenzollern | | Place of origin | Hohenzollern Castle, Swabia, southern Germany | | Ruled | Brandenburg from 1415, Prussia from 1618, Germany from 1871 | | Royal title | King in Prussia from 1701, King of Prussia from 1772 | | Imperial title | German Emperor, 1871 to 1918 | | German Emperors | Wilhelm I, Frederick III, Wilhelm II | | Monarchy ended | 9 November 1918 | | Present head of the house | Georg Friedrich, Prince of Prussia, since 1994 | | Principal residences | Berlin City Palace, Sanssouci and Cecilienhof at Potsdam, Charlottenburg | | Branch shown here | The senior Prussian line only, not Hohenzollern-Sigmaringen |
The Rockefeller family is an American business and philanthropic dynasty founded on the Standard Oil fortune of John D. Rockefeller, whose descendants have shaped American banking, conservation, medicine, modern art and national politics across five generations. From a modest upstate New York farmhouse the family rose to control the largest industrial enterprise of the Gilded Age, then spent the twentieth century converting that fortune into foundations, museums, parks and public office. ## Origins The line begins with William Avery Rockefeller (1810-1906), a traveling salesman from Granger, New York, and his wife Eliza Davison (1813-1889), who married in 1837 and raised six children in Richford, Moravia and Owego before the family moved to Ohio. Their eldest son, John D. Rockefeller, began as a Cleveland bookkeeper, entered oil refining in 1863 and incorporated the Standard Oil Company in 1870 together with his younger brother William Rockefeller. By the 1880s Standard Oil refined the great majority of American petroleum, until the Supreme Court ordered its dissolution in 1911. ## Notable members John D. Rockefeller and Laura Spelman Rockefeller had four children who reached adulthood, among them the Chicago arts patron Edith Rockefeller McCormick and the family's only son, John D. Rockefeller Jr. With Abby Aldrich Rockefeller, a co-founder of the Museum of Modern Art, John Jr. had six children who defined the family's public face: Abby "Babs" Rockefeller Mauze, the philanthropist John D. Rockefeller III, Nelson Rockefeller, who served four terms as Governor of New York and then as Vice President of the United States, the conservationist and venture capitalist Laurance Rockefeller, Winthrop Rockefeller, Governor of Arkansas, and the banker David Rockefeller of Chase Manhattan. Their children, known within the family as the Cousins, include Senator Jay Rockefeller of West Virginia, the Asmat art collector Michael Rockefeller, Lieutenant Governor Winthrop Paul Rockefeller of Arkansas, the economist Neva Goodwin and the Synergos founder Peggy Dulany. ## Significance The family's lasting mark is institutional rather than dynastic. The Rockefeller Foundation, the University of Chicago, Rockefeller University, the Rockefeller Brothers Fund, Rockefeller Center, the Museum of Modern Art, Colonial Williamsburg, Lincoln Center, the Asia Society and several national parks all trace their founding or their endowment to a Rockefeller. Few American families have moved so completely from industrial fortune to organized philanthropy and elected office within three generations. | Fact | Details | | --- | --- | | Surname | Rockefeller | | Origin | Richford, New York, United States | | Founder | John D. Rockefeller (1839-1937) | | Family business | Standard Oil, later Chase Manhattan Bank | | Known for | Standard Oil, the Rockefeller Foundation, Rockefeller Center, the Museum of Modern Art | | Public offices held | Vice President of the United States, Governor of New York, Governor of Arkansas, United States Senator | | Generations covered | Five, from William Avery Rockefeller to the fourth-generation Cousins |
Cosimo I de' Medici's recorded parents are Giovanni de' Medici (dalle Bande Nere), Maria Salviati.
Cosimo I de' Medici has 2 recorded children: Francesco I de' Medici, Ferdinando I de' Medici.
Cosimo I de' Medici married Eleanor of Toledo.
Cosimo I de' Medici is recorded as Grand Duke of Tuscany in the Medici family tree.
Cosimo I de' Medici's recorded native place is Florence, Republic of Florence.
15 ancestors and 8 descendants of Cosimo I de' Medici are recorded so far, within a tree of 41 people.
Cosimo I de' Medici is recorded as Lorenzo de' Medici's Great-Grandson.
Cosimo I de' Medici is recorded in the Medici family tree on My rOoOts, alongside 40 other people.
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