Cognomen Blaisy (Blaisy 
) , in all the world, is an extremely rare last name. The last name Blaisy is characteristic of Western Europe, particularly France, where it is a very rare surname. Much more prevalently, Blaisy is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Blaisy | Philippines, France, Spain, India, Democratic Republic of the Congo |
| jean iii de blaisy, seigeneur de mauvilly - 28 Sep 1396 Nikopolis in battle |
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| geoffroy ii de blaisy, seigneur de mauvilly et de prangey - 1372 |
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| alexandre i de blaisy, seigneur de blaisy, seigneur de mauvilly - 1341 |
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| alexandre iii de blaisy, seigneur de blaisy et de chaudenay |
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