Family name ยุทธยงค์ (ยุทธยงค์ 
, Yuttayong 
, Yuthyong) , around the globe, is a rare cognomen. The family name ยุทธยงค์ is habitual in Thailand, where it is a rare surname, and the United States, where it is an extremely rare surname. Very seldom, ยุทธยงค์ is the forename as well as the last name.