Cognomen ยุทธสาร (ยุทธสาร 
, Yudhthasarn, Yuthasard) , across the world, is an extremely rare surname. The family name ยุทธสาร is characteristic of South-eastern Asia, particularly Thailand, where it is an extremely rare surname. More frequently, ยุทธสาร is the forename as well as the last name.