Cognomen Onruthai (Onruthai 
) , in the world, is a very rare family name. The family name Onruthai is characteristic of Thailand, where it is an extremely rare surname, and China. More frequently, Onruthai is the forename as well as the last name.
Sansao, Boonmanee, Jundeang, Janjamsri, Rodnikorn, Phumchai, Boontiam, Srirodpai, Singkaew, Khunwichai, Maktongmanee, Thestawong, Thepsri, Jundang, Kwunwichai, Kriphet, Sriunprasert, Manosri, Tafoei, Nilsang, and Charoenwongsiri