Cognomen 怀俊 (Huaijun 
, 怀俊 ) , in the entire world, is a rare surname. The family name 怀俊 is habitual in Lithuania, where it is a rare surname, China, where it is a very rare surname, and Spain, where it is an extremely rare surname. More prevalently, 怀俊 is the forename as well as the last name.