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Family name Costant (Costant
) , in all the world, is a very rare cognomen. The family name Costant is habitual in France, where it is a very rare surname, Australia, and Israel. Measured by absolute frequency, it is commonest in France, Nigeria, and Australia. More frequently, Costant is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Costant | Greece, France, Nigeria, Australia, Democratic Republic of the Congo |
Gaya, Licata, Libilibi, Lounzitissa, and Makoundi