Family name Grenger (Grenger 
) , in the world, is a very rare cognomen. The surname Grenger is habitual in the United Kingdom, where it is an extremely rare surname, the United States, and Italy. Much less frequently, Grenger is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Grenger | Philippines, Italy, Brazil, United Kingdom, United States |