Family name Gajabahu (Gajabahu 
) , all over the world, is a rare last name. The family name Gajabahu is characteristic of Southern Asia, particularly Sri Lanka, where it is quite a rare surname. Much less frequently, Gajabahu is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Gajabahu | Sri Lanka, India |
| gajabahu ii of polonnaruwa king of Polonnaruwa |
|
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| gajabahu i of anuradhapura King of Anuradhapura from c.113 to c.135 |
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