Somdet Phra Samphanthawong Thoe Chaofa Krommaluang Thep-harirak (Thai: สมเด็จพระสัมพันธวงศ์เธอ เจ้าฟ้ากรมหลวงเทพหริรักษ์, 1759–1805), birth name Tan (ตัน), was a prince of Siam.
[1] Prince Thepharirak was the eldest son of Princess Sri Sudarak (เจ้าฟ้ากรมพระศรีสุดารักษ์) (sister of Phutthayotfa Chulalok) and her Chinese husband[2] Ngoen Saetan (เงิน แซ่ตัน).
Chaophraya Aphaiphubet (Vietnamese: Chiêu Thùy Biện 昭錘卞), the governor of Cambodia, also sent 5000 Cambodian soldiers to support them.
[3] They were utterly beaten by Nguyễn Huệ in Rạch Gầm-Xoài Mút, and fled to Cambodia.
[5] He is the progenitor of the Devahastin family, a cadet branch of Chakri Dynasty that descended directly from the siblings of King Rama I.