Cognomen ไชยยุทธ์ (ไชยยุทธ์ 
) , all over the world, is a very rare family name. The last name ไชยยุทธ์ is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname. Likewise, ไชยยุทธ์ is the forename as well as the last name.