Family name Ursa (Osa 
, Ursa 
, Yrsa 
) , in all the world, is a common cognomen. The cognomen Ursa is habitual in Aland Islands, where it is quite a common surname, Equatorial Guinea, and Slovenia, where it is quite a rare surname. Measured by absolute frequency, this name is the most popular in Egypt, Nigeria, and Indonesia. Also, Ursa is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Osa | Spain, India, Nigeria, Egypt, Indonesia |
| Ursa | Spain, Slovenia, India, Romania, Indonesia |
| Yrsa | Argentina, United States, Sweden, Denmark, Germany |
| Ourse | France, United States, Malaysia, India |
| mihaela ursa Romanian literary critic, RO (b. 1971) |
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| ilie ursa RO |
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