In the entire world, Ustinia (Устинья 
, Устиня , Ustinia 
) is quite a rare female first name. The first name Ustinia is characteristic of Kazakhstan, where it is quite a rare girly name, Russia, where it is a rare female name, and Ukraine.
| VARIANT | COUNTRY |
|---|---|
| Устинья | Ukraine, Belarus, Russia, Kyrgyzstan, Kazakhstan |
| Устиня | Ukraine, Kazakhstan, Russia |
| Ustinia | Brazil, Romania, Venezuela, Georgia |
| ustinia danilovna Russian princess (b. 1250) |
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| ustinia perepelitsa Ukrainian Righteous Among the Nations, UA (b. 1903) |
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| ustinia vinogradova Russian Righteous Among the Nations, RU (b. 1904) |
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| ustinia petrenko Ukrainian Righteous Among the Nations, UA (b. 1908) |
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| ustinia vasilieva Lithuanian Righteous Among the Nations, LT |
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| ustinia maruschak Ukrainian Righteous Among the Nations, UA |
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