Cognomen Yaohan (耀汉 
, 瑶函 , Yaohan 
) , in the world, is a rare last name. The surname Yaohan is habitual in Malaysia, where it is a rare surname, China, where it is a very rare surname, and Indonesia. More prevalently, Yaohan is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| 瑶函, 耀汉 | China |
| Yaohan | China, Indonesia, Malaysia, United States, France |