Family name Kerwan (Kerwan 
) , around the globe, is a rare surname. The family name Kerwan is habitual in Lesotho, where it is quite a rare surname, Syria, where it is a rare surname, and South Africa, where it is a very rare surname. Much less frequently, Kerwan is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Kerwan | Lesotho, South Africa, France, United States, Syria |