Family name Monast (Monast 
) , in all the world, is a rare last name. The last name Monast is characteristic of Canada, where it is a rare surname, New Zealand, and the United States, where it is a very rare surname. Much less frequently, Monast is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Monast | China, Spain, United States, Canada, New Zealand |
| louis monast American politician (1863-1936), US (b. 1863) |
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| serge monast Canadian writer, CA (b. 1945) |
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| calixte monast researcher (ORCID 0000-0002-4724-848X) |
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| anie monast researcher |
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| guillaume monast Canadian ice hockey player, CA (b. 1988) |
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