Rama VIII (Ananda Mahidol) 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.

Buddha Loetla Nabhalai, known as Rama II, ruled Siam from 1809 to 1824 as the second monarch of the Chakri dynasty. Born in 1767, the son of Rama I and Queen Amarindra, he is remembered chiefly as a poet-king who revived Siamese literature and classical arts after the disruptions of the eighteenth century, personally composing verse and sponsoring the royal poets of his court. He fathered two sons who would each later reign as king: Prince Jessadabodindra, by consort Sri Sulalai, who became Rama III, and Prince Mongkut, by principal queen Sri Suriyendra, who became Rama IV. He died in Bangkok in 1824.

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.

Mongkut, known as Rama IV, reigned as King of Siam from 1851 to 1868. Born in 1804, the son of Rama II and Queen Sri Suriyendra, he spent 27 years as a Buddhist monk, rising to become a respected scholar of Pali scripture, science, and Western languages, before his accession at age 47 following the death of his half-brother Rama III. As king he opened Siam to Western trade and diplomacy through treaties including the 1855 Bowring Treaty, while preserving the kingdom's independence during an era of European colonial expansion in Southeast Asia. His employment of British tutor Anna Leonowens later inspired a heavily fictionalized Western portrayal of his court. His son with Queen Debsirindra, Chulalongkorn, succeeded him as Rama V.

Vajiravudh, known as Rama VI, reigned as King of Siam from 1910 to 1925. Born in 1880, the son of Rama V and Queen Saovabha Phongsri, he was educated in Britain and became a prolific writer and translator, introducing Western drama and modern Thai literature to the court. He introduced the use of surnames in Siam, established the Wild Tiger Corps paramilitary organization, and brought Siam into the First World War on the Allied side in 1917. He had no son; a daughter was born to him only days before his death in 1925, so the throne passed to his younger brother, Prajadhipok, who became Rama VII.

Prajadhipok, known as Rama VII, reigned as King of Siam from 1925 to 1935 and was the last absolute monarch of the Chakri dynasty. Born in 1893, the youngest son of Rama V and Queen Saovabha Phongsri, he came to the throne unexpectedly after his brother Rama VI died without a surviving son. His reign was transformed by the bloodless Siamese revolution of 1932, which ended absolute monarchy and established a constitutional system; he initially cooperated with the new government but, after political disputes over his powers, abdicated the throne in 1935 while in England, where he remained until his death in 1941. He married Queen Rambhai Barni and had no children.

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.

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.

Somdet Phra Sri Suriyendra (born Boonrod) was the principal queen consort of King Rama II and mother of Prince Mongkut, who later reigned as Rama IV. Born in 1767, she was a cousin of her husband and held the highest rank among his consorts, giving her son a strong claim to the succession that was nonetheless passed over in 1824 in favor of his older half-brother, Rama III. She lived to see Mongkut spend nearly three decades as a Buddhist monk before finally ascending the throne in 1851, though she died in 1836, some years before his accession.