Cognomen ปัญจศิริ (ปัญจศิริ 
, Punjasiri , Panjasiri ) , in the entire world, is a rare last name. The last name ปัญจศิริ is habitual in South-eastern Asia, particularly Thailand, where it is a rare surname. Very seldom, ปัญจศิริ is the forename as well as the last name.