Cognomen Сем (Sam 
, Sem 
, Sems 
) , globally, is a widespread family name. The family name Сем is characteristic of Macao, where it is a common surname, Saint Vincent and the Grenadines, and Ghana (explore the name in all countries). In absolute terms, it is commonest in Ghana, Nigeria, and Algeria. Also, Сем is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Sam | Nigeria, Kenya, United States, Algeria, Ghana |
| Sem | Nigeria, Australia, United States, Algeria, Ghana |
| Sems | Egypt, Malaysia, Indonesia, United States, India |
| Сем | Kazakhstan, Russia, Kyrgyzstan, Ukraine |