Cognomen Koyounian (Koyounian 
) , in all the world, is a rare surname. The surname Koyounian is habitual in Lebanon, where it is quite a rare surname, Uruguay, where it is a rare surname, and Canada, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Koyounian | Canada, Lebanon, Uruguay, United States |
| givanni koyounian Roman Catholic clergyman |
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