Surname Lachance (Lachance 
) , worldwide, is a common cognomen. The cognomen Lachance is characteristic of Canada, where it is quite a common surname, New Zealand, where it is quite a rare surname, and Ivory Coast. Measured by absolute frequency, this name is the most popular in Canada, the United States, and New Zealand. Very seldom, Lachance is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Lachance | Canada, Democratic Republic of the Congo, United States, New Zealand, Ivory Coast |
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arthur lachance Canadian politician, CA (b. 1868) |
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walter william lachance Canadian architect, CA (b. 1870) |
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| candy lachance American baseball player (1870-1932), US (b. 1870) |
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laurent lachance Canadian writer, CA (b. 1931) |
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janine lachance Canadian pianist, CA (b. 1932) |
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| georges lachance American painter, US (b. 1888) |
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| jason lachance Canadian paralympian (b. 1901) |
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| camille lachance Canadian Catholic priest, CA (b. 1904) |
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| louis lachance CA (b. 1899) |
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| rené-o. lachance plant pathologist and university professor, CA (b. 1909) |
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| gustave lachance Canadian physician, CA (b. 1912) |
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catherine lachance Canadian actress, CA (b. 1969) |
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| georges-c. lachance Canadian politician, CA (b. 1926) |
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| fernand lachance CA (b. 1917) |
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bruno lachance Canadian radio host, CA (b. 1979) |
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