Surname Ketnapa (Ketnapa 
) , all around the world, is an extremely rare last name. Much more frequently, Ketnapa is the forename as well as the last name.
Siri, Sawatdisara, Pankumneard, Panichcharoenkit, Sirichaiekawat, Chatnampet, Roungdet, Raungdet, Phonphan, Promsong, Kosawititkul, Duangpoommet, Srilakod, Naibutsakul, Thubson, Rungdet, Rongdet, Mahapun, Insang, Lemmid, Boonma, Decha, Toin, Nalbutsakul, and Nuntarattapan