Family name Грегер (Greger 
, Greguer 
, Грегер 
) , throughout the world, is quite a common cognomen. The family name Грегер is characteristic of Germany, where it is quite a rare surname, Norway, and Austria. Not in comparison with a country's population, it is commonest in Germany, the United States, and Brazil. Very seldom, Грегер is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Greger | Germany, Sweden, United States, Poland, Brazil |
| Greguer | Nicaragua, Brazil, United States, Peru, Venezuela |
| Грегер | Kazakhstan, Russia, Ukraine |
Gergely, Gregers, Gregor, Gregorio, Gregorius, Gregory, Greher, Grigalius, Grigor, Grigori, Grigorij, Grigory, Grzegorz, Grzesiek, Grzesiu, Grześ, Grégory, Hreher, Krikor, Reijo, Γρηγόριος, Гжегож, Грег, Грегор, Грегори, Грегорио, Грегорі, Грегоріо, Григор, Григорий, Григорій, Гриня, Гриша, Грыгоры, Крикор, Рейо, Рыгор, גרגורי, גרגר, غريغور, غريغوري, გრიგოლი, グレガー, グレゴリー, 格雷戈里, and 格雷戈里奥