Cognomen จันสุ (Jansu 
, จันสุ ) , throughout the world, is a very rare last name. The family name จันสุ is characteristic of Georgia, where it is a rare surname, Estonia, and Thailand, where it is a very rare surname. Measured by absolute frequency, it is commonest in Thailand, Georgia, and France. More prevalently, จันสุ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Jansu | Georgia, Thailand, India, Iraq, France |
| จันสุ | Thailand |