Surname Onstein (Onstein 
) , throughout the world, is a rare cognomen. The family name Onstein is characteristic of Netherlands, where it is quite a rare surname, Norway, where it is a rare surname, and Germany. Much less frequently, Onstein is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Onstein | Netherlands, Belgium, Norway, Canada, Germany |
| e.j.r. van grotenhuis van onstein (b. 1775) |
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| ruud onstein cricketer (b. 1939) |
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| victor onstein NL (b. 1953) |
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| renske e. onstein researcher ORCID ID = 0000-0002-2295-3510 |
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