Family name เมธาวงศ์ (เมธาวงศ์ 
, Maytavong ) , in the entire world, is a rare surname. The cognomen เมธาวงศ์ is habitual in South-eastern Asia, particularly Thailand, where it is a rare surname. Much less frequently, เมธาวงศ์ is the forename as well as the last name.