Princess Arunvadi (Thai: ???????; 13 June 1857 - 26 August 1933) was a Princess of Siam (later Thailand).
She was a member of Siamese royal family and a daughter of King Mongkut of Siam and Chao Chom Manda Run.
Her mother was Chao Chom Manda Run Supanimitr (is a daughter of Kratai Supanimitr and Cham Supanimitr).
She was given full name as Phra Chao Borom Wong Ther Phra Ong Chao Arunvadi (Thai: ????????????????? ??????????????????).
Princess Arunvadi died on August 26, 1933 at the age of 76.