Surname Gamache (Kamasz 
, Gamache 
) , globally, is quite a common last name. The last name Gamache is habitual in Canada, where it is quite a rare surname, Hungary, and New Zealand. Not in comparison with a country's population, it most frequently occurs in the United States, Canada, and France. Much less frequently, Gamache is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Kamasz | Canada, Poland, Australia, Hungary, United States |
| Gamache | Canada, France, New Zealand, United States, Algeria |
| nicolas gamache 21 May 1680 Montmagny, Québec - 2 Oct 1734 L'Islet, Québec (b. 1680) |
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| augustin gamache (31 Jan 1686 - ) (b. 1686) |
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| geneviève gamache 5 Oct 1692 L'Islet, Québec - 19 Mar 1735 (b. 1692) |
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| marguerite geneviève gamache 27 Oct 1694 Cap St.Ignace, Montmagny, Quebec - 2 Dec 1759 Cap St.Ignace, Montmagny (b. 1694) |
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| louise gamache 1716 - (b. 1716) |
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| elisabeth gamache 1719- (b. 1719) |
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marcel gamache Canadian humorist (1913-1995), CA (b. 1913) |
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simon gamache Canadian ice hockey player, CA (b. 1981) |
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| janine gamache Canadian painter, CA (b. 1931) |
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| raymond-marie gamache Canadian Catholic priest and missionary, CA (b. 1937) |
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| andré gamache computer scientist and professor at Université Laval, CA (b. 1940) |
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| élène gamache Canadian artist, CA (b. 1951) |
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| vincent gamache American football punter, US (b. 1961) |
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| joey gamache American boxer, US (b. 1966) |
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| line gamache CA (b. 1957) |
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