Family name Lafontaine (Lafontaine 
) , throughout the world, is a common cognomen. The surname Lafontaine is characteristic of Martinique, where it is a common surname, Guadeloupe, where it is quite a common surname, and Canada. In absolute terms, this name is the most popular in Canada, the United States, and France. Much less frequently, Lafontaine is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Lafontaine | Canada, France, United States, Belgium, Martinique |
Lafountaine, and Лафонтаине
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ludolf lafontaine German painter, DE (b. 1704) |
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| mademoiselle de lafontaine French ballet dancer, FR (b. 1655) |
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| lafontaine bellot (b. 1650) |
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| georg lafontaine (b. 1680) |
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| georg wilhelm lafontaine DE (b. 1680) |
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| marguerite guérin dite lafontaine 6 May 1703 Laprairie, Québec - 10 Mar 1757 Laprairie, Quebec (b. 1703) |
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| marie-ursule marion dit lafontaine 11 Dec 1703 St.Nicholas, Quebec - May 1744 St.Nicholas, Quebec (b. 1703) |
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franz leopold lafontaine German physician, DE (b. 1756) |
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august heinrich julius lafontaine German novelist, DE (b. 1758) |
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| benno leopold ignatius lafontaine 17 Jun 1731 Biberach - 8 Feb 1777 Biberach (b. 1731) |
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sophie lafontaine (1790-1831) (b. 1790) |
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charles lafontaine French writer (1803-1892), FR (b. 1803) |
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| pierre joseph lafontaine Belgian painter (1758-1835), BE (b. 1758) |
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| carl arnold friedrich lafontaine DE (b. 1755) |
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| jean-françois lafontaine NL (b. 1763) |
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