Cognomen Koyama-Sojot (Koyama-Sojot 
) , all over the world, is an extremely rare family name. The family name Koyama-Sojot is habitual in Northern America, particularly the United States, where it is an extremely rare surname. Parts of the name also exists independently as a last name Koyama, and a last name Sojot.
| VARIANT | COUNTRY |
|---|---|
| Koyama-Sojot | United States |