Family name ใจสุ (Chaisu 
, ใจสุ ) , in the entire world, is a rare cognomen. The last name ใจสุ is habitual in Thailand, where it is a rare surname, Malaysia, where it is a very rare surname, and the United States, where it is an extremely rare surname. Not in comparison with a country's population, the name is most common in Thailand, Malaysia, and India. Much less frequently, ใจสุ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Chaisu | United States, Thailand, India, Malaysia |
| ใจสุ | Thailand |