Family name 孝友 (孝友 
, Xiaoyou 
) , in the world, is a rare cognomen. The last name 孝友 is habitual in China, where it is a very rare surname, Spain, where it is an extremely rare surname, and Brazil. More frequently, 孝友 is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| 孝友 | China |
| Xiaoyou | Brazil, Spain, United States, China, Ecuador |