Family name Yongsee (Yongsee 
) , in all the world, is an extremely rare cognomen. The cognomen Yongsee is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname. Much less frequently, Yongsee is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Yongsee | Thailand, United States |