| Heirs to the Thai Throne
|
| Heir
|
Status
|
Relationship to monarch
|
Became Heir
|
Ceased to be Heir
|
Next in line of succession
(Relation to heir)
|
Monarch
|
| Date
|
Reason
|
Date
|
Reason
|
Crown Prince Maha Vajirunhis
|
Heir apparent
|
Eldest son with queens[a] |
14 January 1886
|
New creation
|
4 January 1895
|
Died of typhoid
|
Prince Vajiravudh, Prince of Ayutthaya
1886–1895, younger half-brother
|
Rama V
|
Crown Prince Maha Vajiravudh
|
Heir apparent
|
Third son with queens[b] |
4 January 1895
|
Elder half-brother died
|
23 October 1910
|
Father died; became king
|
Prince Chakrabongse Bhuvanath, Prince of Phitsanulok
1895–1910, younger brother
|
Prince Chakrabongse Bhuvanath, Prince of Phitsanulok
|
Heir presumptive
|
Younger brother
|
23 October 1910
|
Elder brother became king
|
13 June 1920
|
Died of pneumonia
|
Prince Asdang Dejavudh, Prince of Nakhon Ratchasima
1910–1920, younger brother
|
Rama VI
|
Prince Asdang Dejavudh, Prince of Nakhon Ratchasima
|
Heir presumptive
|
Younger brother
|
13 June 1920
|
Elder brother died
|
9 February 1924
|
Died of nephrosis
|
Prince Chudadhuj Dharadilok, Prince of Phetchabun
1910–1923, younger brother
|
Prince Varananda Dhavaj Chudadhuj
1923–1924, nephew
|
Prince Varananda Dhavaj Chudadhuj
|
Heir presumptive
|
Nephew
|
9 February 1924
|
Uncle died
|
2 September 1924
|
Skipped by the royal command[c][5] |
Prince Prajadhipok Sakdidej, Prince of Sukhothai
1924, uncle
|
Prince Prajadhipok Sakdidej, Prince of Sukhothai
|
Heir presumptive
|
Younger brother
|
2 September 1924
|
Nephew was skipped
|
25 November 1925
|
Elder brother died; became king
|
Prince Mahidol Adulyadej, Prince of Songkla
1924–1925, elder half-brother
|
Prince Mahidol Adulyadej, Prince of Songkla
|
Heir presumptive
|
Elder half-brother
|
25 November 1925
|
Younger half-brother became King
|
24 September 1929
|
Died of pneumonia
|
Prince Ananda Mahidol
1925–1929, eldest son
|
Rama VII
|
Prince Ananda Mahidol
|
Heir presumptive
|
Half-nephew
|
24 September 1929
|
Father died
|
2 March 1935
|
Abdication of half-uncle; became king
|
Prince Bhumibol Adulyadej
1929–1935, younger brother
|
Prince Bhumibol Adulyadej
|
Heir presumptive
|
Younger brother
|
2 March 1935
|
Elder brother became King
|
9 June 1946
|
Elder brother died; became King
|
Prince Paribatra Sukhumbandhu, Prince of Nakhon Sawan
1935–1944, half-uncle
|
Rama VIII
|
Prince Chumbhotbongs Paribatra
1944–1946, half-first cousin
|
Prince Chumbhotbongs Paribatra, Prince of Nakhon Sawan II
|
Heir presumptive
|
Half-first cousin
|
9 June 1946
|
Half-first cousin became king
|
28 July 1952
|
Son born to king
|
Prince Sukhumabhinanda
1946–1952, half-brother
|
Rama IX
|
Crown Prince Maha Vajiralongkorn
|
Heir apparent
|
Only Son
|
28 July 1952
|
Born
|
13 October 2016
|
Father died; became King
|
Prince Chumbhotbongs Paribatra, Prince of Nakhon Sawan II
1952–1959, half-first cousin once removed
|
Prince Sukhumabhinanda
1959–1974, half-first cousin once removed
|
Princess Maha Chakri Sirindhorn, Princess Royal
1974–1978, younger sister
|
Princess Bajrakitiyabha
1978–1979, only daughter
|
Prince Juthavachara Mahidol
1979–1997, eldest son
|
Princess Bajrakitiyabha
1997–2005, eldest daughter[d] |
Prince Dipangkorn Rasmijoti
2005–2016, only recognised son
|
Prince Dipangkorn Rasmijoti
|
Heir presumptive
|
Only recognised son[e] |
13 October 2016
|
Father became king
|
Incumbent
|
Princess Bajrakitiyabha, Princess Rajasarini Siribajra
2016–present, elder half-sister
|
Rama X
|
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