Cognomen แพงใจ (แพงใจ 
, Paengjai 
, Phaengjai ) , all over the world, is a rare last name. The surname แพงใจ is characteristic of South-eastern Asia, particularly Thailand, where it is a rare surname, and Malaysia, where it is an extremely rare surname. Much less frequently, แพงใจ is the forename as well as the last name.