Family name Lacay (Lacay 
) , worldwide, is quite a rare last name. The cognomen Lacay is habitual in Philippines, where it is quite a rare surname, United Arab Emirates, where it is a rare surname, and Argentina. Measured by absolute frequency, it most frequently occurs in Philippines, Argentina, and France.
| VARIANT | COUNTRY |
|---|---|
| Lacay | Saudi Arabia, Philippines, France, United States, Argentina |
| josé lacay Dominican singer (1947-2016), DO (b. 1947) |
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| ludovic lacay FR (b. 1985) |
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