Family name Ustav (Ustav 
) , around the globe, is a rare surname. The cognomen Ustav is characteristic of Estonia, where it is quite a common surname, Finland, where it is a rare surname, and China, where it is an extremely rare surname. Much less frequently, Ustav is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Ustav | Estonia, Sweden, India, China, Finland |
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mart ustav Estonian biomedical scientist, entrepreneur, EE (b. 1949) |
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cecilia ustav ventriloquist, SE (b. 1989) |
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| ustav mikelsaar (b. 1943) |
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