Princess Kannikakaew, the Princess Khattiyakanlaya (Thai: กรรณิกาแก้ว; RTGS: Kannika Kaeo; 10 December 1855 – 13 May 1882) was the Princess of Siam (later Thailand. She was a member of Siamese royal family and was a daughter of King Mongkut and Princess Phannarai. She was a half-sister (different mother) of King Chulalongkorn and had one younger brother, Prince Narisara Nuvadtivongs.^[1]