Cognomen Patthamon (Patthamon 
) , in the entire world, is an extremely rare family name. The cognomen Patthamon is characteristic of South-eastern Asia, particularly Thailand, where it is an extremely rare surname. Much more prevalently, Patthamon is the forename as well as the last name.
Sawat, Lahankaew, Naiyachit, Nawapakpilai, Fakthong, Yukkasemwong, Muensombat, Saengvongsa, Singhopol, Surawatphakin, Susangiem, Rakkhamsoo, Wongsaksri, Reangchainam, Vanichaparm, Kittisophon, Jantapratet, Jirawattanachai, Piwatpacharakul, Watthananaphakij, Panyawut, Khamngoen, Budda, Saynoy, Singin, Sing-In, Baseam, Bunsit, Lekmamee, Jaijun, Suanboon, Boonmee, Kokoblarp, Jeasakul, Naprang, Inthanu, Wongnak, Utaikorn, Chomchit, Pattpornpun, and Chanthanuraksa