Cognomen Wisomsiwanat (Wisomsiwanat 
) , in the world, is a very rare surname. The cognomen Wisomsiwanat is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Wisomsiwanat | Thailand |
Wirapan, Phatchaneewan, and Patchaneewan