Cognomen Merlay (Merlay 
) , throughout the world, is a very rare family name. The cognomen Merlay is characteristic of France, where it is a rare surname, Venezuela, where it is a very rare surname, and the United Kingdom, where it is an extremely rare surname. Very seldom, Merlay is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Merlay | France, United Kingdom, Venezuela, Philippines |
| ralph de merlay English nobleman |
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| roger de merlay (est. 1210 - before 4 Dec 1265) |
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| isabel de merlay 1258 |
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| roger de merlay (1173-1239) |
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| agnes de merlay (1185-1230) |
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| roger de merlay - 1188 |
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