Family name Guerchy (Guerchy 
) , around the world, is a very rare last name. The cognomen Guerchy is habitual in Northern Africa, particularly Tunisia, where it is a rare surname. Predominantly, Guerchy is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Guerchy | Tunisia, Democratic Republic of the Congo |
| louis de régnier de guerchy (1663-1748) (b. 1663) |
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claude louis françois régnier de guerchy French diplomat, FR (b. 1715) |
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| isabeau de guerchy |
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