Surname แพงฤทธิ์ (แพงฤทธิ์ 
, Paengrit , Phaengrit) , worldwide, is an extremely rare family name. The family name แพงฤทธิ์ is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname. Very seldom, แพงฤทธิ์ is the forename as well as the last name.