Last name ไกรฤทธิ์ (ไกรฤทธิ์ 
, Krairit 
) , all over the world, is a rare cognomen. The cognomen ไกรฤทธิ์ is characteristic of Thailand, where it is a rare surname, Australia, where it is a very rare surname, and the United States, where it is an extremely rare surname. More prevalently, ไกรฤทธิ์ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| ไกรฤทธิ์ | Thailand |
| Krairit | Australia, Thailand, United States |