Cognomen Неусыпин (Неусыпин 
) , globally, is a very rare family name. The surname Неусыпин is habitual in Eastern Europe, particularly Russia, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Неусыпин | Russia |
|
неусыпин, константин авенирович RU (b. 1960) |
|
Авенир, Владимир, and Константин