Kannabhorn Bejaratana (Thai: กรรณาภรณ์เพ็ชรรัตน์; RTGS: Kannaphonphetcharat; 12 August 1878 – 31 May 1880), was a Princess of Siam (later Thailand). She was a member of the Siamese Royal Family. She was a daughter of King Chulalongkorn. She was given her full name, Kannabhorn Bejaratana Sohbhandasaniyalak Akaravorarajakumari (Thai: กรรณาภรณ์เพ็ชรรัตน์ โสภางคทัศนิยลักษณ์ อรรควรราชกุมารี; RTGS: Kannaphonphetcharat Sophangthatsaniyalak Akkhaworaratchakumari) by her father. Her royal cremation ceremony was held together with her mother's at Sanam Luang, presided over by King Chulalongkorn.