Prince Kashemsanta Sobhaga, the Prince Phromwaranurak (; ; 18 August 1856 â 4 January 1924) was a Prince of Siam (later Thailand), a member of the Siamese royal family, and a member of the House of Kashemsanta. He was a son of King Mongkut of Siam. He was the head of the Kashemsant dynasty.
His mother was Chao Chom Manda Pae Dharmasaroja, who was a daughter of Phra Samranharuethai (Uan Dharmasaroja) and Thao Songkandan (Si Dharmasaroja). He had 4 siblings, 2 elder sisters, 1 younger brother and 1 younger sister.
Prince Kashemsanta Sobhaga died 4 January 1924 at the age 67.