Who is XXX's sister?
Charoensri Chanamayu
Her Royal Highness Princess Charoensri Chanamayu or Phra Chao Boromwongse Ther Phra Ong Chao Charoensri Chanamayu (RTGS: Charoensi Chonmayu) (Thai: พระเจ้าบรมวงศ์เธอ พระองค์เจ้าเจริญศรีชนมายุ) (31 March 1878 -- 24 December 1916), was the 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, son of Chao Phraya Nikara Bodindra (Toh) who built Galyanamitra Temple. Princess Charoensri Chanamayu had 3 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 on 24 December 1916, at the age of only 38.
Beatrice Bhadrayuvadi