Cognomen Porhathai (Porhathai 
) , all over the world, is an extremely rare last name. Much more frequently, Porhathai is the forename as well as the last name.
Soonsan, Chairat, Kongsut, Limchun, Loetchalao, Jivarut, Sasananun, Srimanee, Phanjittraporn, Srinukool, Chaiyarit, Arpapornnopparat, and Pipatchaiyapoom