Last name พิบูลย์ (พิบูลย์ 
, Piboon 
, Phiboon , and others...) , in the entire world, is quite a rare cognomen. The cognomen พิบูลย์ is habitual in Thailand, where it is quite a rare surname, and the United States, where it is an extremely rare surname. Also, พิบูลย์ is the forename as well as the last name.