Cognomen Ketchan (เกตุจันทร์ 
, เกษจันทร์ , Ketchan 
) , across the world, is quite a rare surname. The surname Ketchan is characteristic of Thailand, where it is quite a rare surname, and the United States, where it is an extremely rare surname. Much less frequently, Ketchan is the forename as well as the last name.
Ryan, Gaysorn, Nattaya, Nipawan, Nutwara, Wichian, Margaret, Poramej, Meredith, Benjamin, Poramate, Janejira, Maneenate, Kittaporn, Phattharin, Supaporn, Phramongkhon, Krasean, Sasinat, Mandy, Susan, Debra, James, Tracy, Napat, Ketwadi, Samran, Arunee, Dillie, Thomas, Ngamta, Matthew, Sarawon, Suphat, and Napatsawan