Rama V (Chulalongkorn) Chakri

Buddha Yodfa Chulaloke, known as Rama I, founded the Chakri dynasty in 1782 after the fall of the Thonburi kingdom and established Bangkok as the new capital of Siam on the east bank of the Chao Phraya River. Born in Ayutthaya in 1737, he rose through military ranks under King Taksin before taking the throne himself. As king, he rebuilt Siamese administration, law, and religion after decades of war with Burma, commissioning a revised legal code and restoring Buddhist temples and texts. His son with chief consort Amarindra, Isarasundhorn, succeeded him as Rama II. He reigned until his death in 1809 and remains the dynasty's namesake, its royal house named for his pre-royal title, Chao Phraya Chakri.

Phra Nangklao, known as Rama III, reigned as King of Siam from 1824 to 1851, succeeding his father Rama II ahead of his more senior half-brother, the future Rama IV. Born in 1788, he expanded Siam's trade with China and, later in his reign, with Western powers, while overseeing military campaigns that secured Siamese influence over Laos and Cambodia. A devout patron of Buddhism, he sponsored the restoration and construction of numerous temples, including Wat Pho and Wat Arun in Bangkok. He never married a principal queen and left no heir positioned to succeed him, so on his death in 1851 the throne passed to his half-brother Mongkut, who became Rama IV.

Princess Ubolratana Rajakanya is the eldest child of King Bhumibol Adulyadej and Queen Sirikit, and the elder sister of King Vajiralongkorn (Rama X). Born in Lausanne, Switzerland in 1951, she gave up her royal titles in 1972 upon marrying an American, Peter Ladd Jensen, and lived in the United States for over two decades, working as an actress and businesswoman. Following her divorce, she returned to live in Thailand in the early 2000s and resumed an active public role in royal family events, though without reinstating her full royal title. She has remained largely engaged in charitable and film-related work.

Maha Vajiralongkorn, known as Rama X, has reigned as King of Thailand since 2016, succeeding his father Bhumibol Adulyadej. Born in Bangkok in 1952, the only son of Bhumibol and Queen Sirikit, he was educated in Australia and the United Kingdom and trained as a military pilot before being formally named Crown Prince in 1972. He assumed the throne after a period of mourning following his father's death, and was formally crowned in a traditional ceremony in 2019. He has been married several times; his current wife, since 2019, is Queen Suthida. He is the tenth monarch of the Chakri dynasty.

Princess Maha Chakri Sirindhorn is the second daughter of King Bhumibol Adulyadej and Queen Sirikit, and a younger sister of King Vajiralongkorn (Rama X). Born in Bangkok in 1955, she pursued advanced academic studies in history, Pali, and Oriental languages, and has long been regarded as one of the most publicly active and popular members of the Thai royal family for her work in education, rural development, and disaster relief. In 1977 she was granted the special title Maha Chakri, elevating her standing among the royal children. She has never married and remains a full-time working member of the royal family.

Princess Chulabhorn Walailak is the youngest child of King Bhumibol Adulyadej and Queen Sirikit, and a younger sister of King Vajiralongkorn (Rama X). Born in Bangkok in 1957, she trained as a scientist, earning a doctorate in organic chemistry, and has spent much of her career researching cancer and pesticide chemistry, founding the Chulabhorn Research Institute in Bangkok in 1987. Unlike her siblings, she has pursued an active scientific and academic career alongside her royal duties, representing Thailand at international science forums, and has also been involved in veterinary medicine and the arts.

Queen Amarindra (born Nak) was the chief consort of King Rama I and the first queen consort of the Chakri dynasty. Born around 1737 in Samut Songkhram, she married the future king before his rise to the throne and supported him through the turbulent years following the fall of Ayutthaya and the Thonburi period. As queen, she was known for her piety and patronage of Buddhist temples in the new capital of Bangkok. Her son Isarasundhorn succeeded his father as Rama II. She lived to see her son and grandson (Rama III) both reign, dying in 1826 at an advanced age, one of the longest-lived consorts of the early dynasty.

Srinagarindra, born Sangwan Talapat and known in her lifetime as the Princess Mother, was the wife of Prince Mahidol Adulyadej and mother of two kings, Ananda Mahidol (Rama VIII) and Bhumibol Adulyadej (Rama IX). Born a commoner in 1900, she trained as a nurse before marrying Mahidol in 1920. Widowed in 1929, she raised her children largely in Switzerland during their education. In her later decades she became widely known in Thailand for founding rural health, education, and forest-conservation programs, earning the popular title Mae Fah Luang, royal mother from the sky, for her work reaching remote hill communities. She died in 1995.

Somdet Phra Sri Sulalai (born Riam) was a royal consort of King Rama II and mother of his eldest surviving son, Prince Jessadabodindra, who reigned as Rama III. Born around 1770 near Nonthaburi, she came from a family involved in the court's confectionery service rather than high nobility, and never held the rank of queen. Her son's accession in 1824, chosen by the Accession Council over more senior-born half-brothers including the future Rama IV, made her one of the most consequential royal mothers of the early Bangkok era. She was posthumously honored with the title Somdet Phra Sri Sulalai. She died in 1837.

Queen Sirikit is the widow of King Bhumibol Adulyadej (Rama IX) and mother of King Vajiralongkorn (Rama X). Born Mom Rajawongse Sirikit Kitiyakara in Bangkok in 1932 to an aristocratic diplomatic family, she met the young king while he was studying in Switzerland and married him in 1950, becoming queen consort the same year. During his reign she championed rural handicrafts, traditional Thai silk weaving, and conservation projects across the country through the SUPPORT Foundation she established. She and Bhumibol had four children: Ubolratana, Vajiralongkorn, Sirindhorn, and Chulabhorn. She holds the title Queen Mother.

Queen Rambhai Barni was the wife of King Rama VII (Prajadhipok), the last absolute monarch of Siam. Born a granddaughter of Rama IV in 1904, she married the future king in 1918 and became queen consort upon his accession in 1925. She accompanied him through the political upheaval of the 1932 revolution and his 1935 abdication, living with him in exile in England until his death in 1941. She had no children and returned permanently to Thailand after the Second World War, devoting her later years to charitable and educational causes until her death in 1984.