Family name Iwar (Iwar 
, Ивар 
) , throughout the world, is a rare cognomen. The surname Iwar is characteristic of Sweden, where it is a rare surname, Nigeria, and Poland, where it is a very rare surname. Measured by absolute frequency, this name is the most popular in Nigeria, Indonesia, and Sweden. Likewise, Iwar is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Iwar | Sweden, Indonesia, Malaysia, Nigeria, Poland |
| Ивар | Kazakhstan, Russia, Kyrgyzstan, Belarus, Ukraine |
| karl iwar Swedish missionary (1857-1913), SE (b. 1857) |
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| elsa iwar Swedish journalist, SE (b. 1904) |
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| håkan iwar SE (b. 1975) |
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