Surname Greenwalt (Greenwalt 
) , in the world, is quite a rare cognomen. The surname Greenwalt is habitual in the United States, where it is a rare surname, Canada, where it is a very rare surname, and Argentina, where it is an extremely rare surname.
| VARIANT | COUNTRY |
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| Greenwalt | Canada, Argentina, United Kingdom, United States, New Zealand |
| greenwalt tibor jack American hematologist, HU (b. 1914) |
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| david greenwalt American director, producer and writer, US (b. 1949) |
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| janelle lynne greenwalt (born 1956) (b. 1956) |
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| dale greenwalt American paleobiologist, US |
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| forrest greenwalt college basketball player (2014–2015) San Diego |
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| travis greenwalt college basketball player (1999–2002) Montana |
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| cisti greenwalt Female basketball player, US (b. 1983) |
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