Cognomen Thephan (Thephan 
) , all over the world, is a very rare family name. The family name Thephan is habitual in Thailand, where it is a very rare surname, France, where it is an extremely rare surname, and Spain. Measured by absolute frequency, it is the most numerous in Thailand, France, and India.
| VARIANT | COUNTRY |
|---|---|
| Thephan | India, Thailand, France, Spain |