Last name Lagace (Lagace 
, Lagacé 
) , throughout the world, is quite a common family name. The cognomen Lagace is habitual in Canada, where it is quite a common surname, New Zealand, where it is quite a rare surname, and the United States, where it is a rare surname.
| VARIANT | COUNTRY |
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| Lagace | Belgium, United States, Canada, France, New Zealand |
| Lagacé | United Kingdom, United States, Canada, France, New Zealand |
| andré meunier dit lagace 4 Oct 1669 Québec - 4 Feb 1729 La Pocatière, Québec (b. 1669) |
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| marie anne meunier dit lagace 1 Nov 1720 La Pocatière, Québec - (b. 1720) |
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jean-guy lagace Canadian ice hockey defenceman, CA (b. 1945) |
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| mike lagace Canadian ice hockey player, CA (b. 1936) |
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| francis lagace Quebec novelist, poet, and essayist (b. 1956) |
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| robert lagace sledge hockey player, CA (b. 1969) |
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| clara lagace Quebec poet |
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| nettie lagace Researcher ORCID = 0000-0002-2302-9119 |
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| d.c. lagace researcher |
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| thomas a lagace researcher (ORCID 0000-0002-6946-4212) |
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| diane c lagace researcher (ORCID 0000-0001-9267-793X) |
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