Last name Watjana (Watjana 
) , around the world, is a very rare cognomen. The family name Watjana is habitual in South-eastern Asia, particularly Indonesia, where it is a very rare surname, and Thailand. More frequently, Watjana is the forename as well as the last name.
Arnu, Trongjai, Chaisombat, Phakawanon, Damrongtum, Wannakosit, Sukontawat, Tongruai, Arunrangsi, Boonyarath, Dangpradab, Chalongkuand, Prasertsinjaroen, Prasertsang, Phanangkaew, Changthong, Phongphanit, Dabseepai, Aroonnual, Wanla, Sotjam, Bunrat, Saetiao, Seahang, Sriploy, Poopanee, Klomtun, Lumplikitkajorn, Jaingam, Jaiklom, Taosiri, Nilsodsai, Waradee, Lilaonitkul, and Maneechotirat