Her Royal Highness Princess Charoensri Chanamayu or Phra Chao Boromwongse Ther Phra Ong Chao Charoensri Chanamayu (RTGS: Charoensi Chonmayu) (Thai: ????????????????? ?????????????????????????) (31 March 1878 – 24 December 1916), was a Princess of Siam (later Thailand).
She was a member of Siamese Royal Family.
She is a daughter of Chulalongkorn, King Rama V of Siam.
Her mother was The Noble Consort (Chao Chom Manda) Saeng Galyanamitra (daughter of Phraya Jayavichit, granddaughter of Chao Phraya Nikara Bodindra (Toh) who built Galyanamitra Temple).
Princess Charoensri Chanamayu had 3 full siblings; 2 elder brothers and 1 elder sister;
Prince Isaravongs Vorarajakumara (4 September 1870 – 5 June 1872)
Prince Nabhanka Nibandhabongs (8 August 1874 – 17 September 1876)
Princess Beatrice Bhadrayuvadi (5 December 1876 – 30 September 1913)Princess Charoensri Chanamayu died 24 December 1916 at age of only 38.