Srisiddhi Thongjaya

Srisiddhi Thongjaya
Prince Siridhaj Sangkas
Born	(1857-10-16)16 October 1857 Bangkok, Siam
Died	11 March 1910(1910-03-11) (aged 52) Bangkok, Siam
Spouse	Um Thipphawat Sa-ngiam Na Nagara Phuean
Names Srisiddhi Thongjaya, the Prince Siridhaj Sangkas
House	House of Sridavaj (Chakri Dynasty)
Father	Mongkut (Rama IV)
Mother	Bua Na Nagara
Minister of Royal Treasury
In office 1894–1896
Preceded by	Narisara Nuwattiwong
Succeeded by	Jayanta Mongkol
2nd Director General of the Supreme Court of Thailand
In office 1889–1912
Monarchs	Chulalongkorn Vajiravudh
Preceded by	Gagananga Yukala
Succeeded by	Svasti Sobhana

Prince Srisiddhi Thongjaya, the Prince Siridhaj Sangkas (Thai: ศรีสิทธิธงไชย; RTGS: Si Sitthi Thongchai; 16 October 1857 – 11 March 1910) was a Prince of Siam. As a son of King Mongkut and Chao Chom Manda Bua, he was a member of Siamese royal family.

His mother was a daughter of Chao Phraya Nakhon Noi, a son of King Taksin. He was given full name as Phra Chao Borom Wong Ther Phra Ong Chao Srisiddhi Thongjaya Krom Khun Siridhaj Sangkas (Thai: พระเจ้าบรมวงศ์เธอ พระองค์เจ้าศรีสิทธิธงไชย กรมขุนสิริธัชสังกาศ).

He had 4 siblings: 1 elder brother, 1 younger sister, and 2 younger brothers:

1. Prince Chalermlaksanaloet
2. Princess Oradaya Debkanya
3. Prince Vadhananuwongse
4. Prince Damrongrit

He was the minister of Finance from 1894 to 1896.