Last name Gratty (Gratty 
) , globally, is a very rare cognomen. The cognomen Gratty is habitual in the United Kingdom, where it is a very rare surname, South Africa, where it is an extremely rare surname, and the United States. Much less frequently, Gratty is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Gratty | United States, United Kingdom, South Africa |