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Cognomen Koiri (Koiri
) , in the entire world, is a common family name. The surname Koiri is habitual in Nepal, where it is quite a common surname, Qatar, where it is quite a rare surname, and Papua New Guinea. In absolute terms, it is commonest in India, Nepal, and Japan. Much less frequently, Koiri is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Koiri | Bangladesh, India, Nepal, Japan, Indonesia |