Last name วิชาฤทธิ์ (Wichit 
, วิชาฤทธิ์ ) , all over the world, is a rare cognomen. The surname วิชาฤทธิ์ is characteristic of Thailand, where it is a rare surname, Sweden, and Malaysia, where it is a very rare surname. More prevalently, วิชาฤทธิ์ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Wichit | Sweden, Myanmar, Malaysia, Thailand, Australia |
| วิชาฤทธิ์ | Thailand |