Family name ภูมิบุตร (ภูมิบุตร 
, Poombut , Phombut ) , all over the world, is a rare surname. The cognomen ภูมิบุตร is habitual in South-eastern Asia, particularly Thailand, where it is a rare surname. Very seldom, ภูมิบุตร is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| ภูมิบุตร, Phombut, Phummabut, Poombut | Thailand |
Bhumibut, Phombutr, Phommabut, Phoomibut, Phumbut, Phumibootra, Phumphutra, Phumputra, Poombuth, and Poomibutr