Cognomen Garreau (Garreau 
) , globally, is quite a common family name. The last name Garreau is characteristic of France, where it is quite a common surname, Canada, where it is a rare surname, and Portugal. In absolute terms, the name is most common in France, the United States, and Canada. Much less frequently, Garreau is the forename as well as the last name.
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| Garreau | Germany, Portugal, France, Canada, United States |
| léonard garreau FR (b. 1609) |
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paul garreau FR (b. 1750) |
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| pierre garreau French politician, FR (b. 1748) |
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jean-pierre garreau French architect (1803-1896), FR (b. 1803) |
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lazare garreau French botanist (1812-1892), FR (b. 1812) |
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| pierre françois garreau FR (b. 1776) |
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| pierre garreau FR (b. 1781) |
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| françois garreau FR (b. 1782) |
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| alphonse garreau French painter (1792-1865), FR (b. 1792) |
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| armand garreau 1817-1865 , Romantic writer, journalist, and educator (b. 1817) |
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| paul garreau FR (b. 1811) |
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| gustave garreau FR (b. 1814) |
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| louis-jean garreau FR (b. 1827) |
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| georges garreau French politician (1852-1943), FR (b. 1852) |
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| maurice garreau FR (b. 1847) |
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