Cognomen Констанций (Constancio 
, Constantius 
, Констанций 
) , all over the world, is a common surname. The family name Констанций is characteristic of Portugal, where it is quite a rare surname, Spain, and Mexico. Measured by absolute frequency, it most frequently occurs in Mexico, Brazil, and Spain. Also, Констанций is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Constancio | Spain, Philippines, Mexico, India, Brazil |
| Constantius | India, Cyprus, Indonesia, Netherlands |
| Констанций | Ukraine |
Constantino, Constantinus, Constantios, Costakis, Costantinos, Costanzio, Costanzo, Costas, Costis, Cottas, Dinos, Konstantinos, Konstantios, Konstantis, Konstantínos, Kostakis, Kostas, Kostis, Kosztasz, Kottas, Kóstas, Ntinos, Takis, Κωνσταντής, Κωνσταντίνος, Κωστάκης, Κωστής, Κώστας, Ντίνος, Τάκης, Константий, Константино, Константинос, Константінос, Костас, קונסטנטין, قسطنطين, and كوستاس