Last name Gannis (Gannis 
) , all over the world, is a very rare cognomen. The family name Gannis is characteristic of Greece, where it is a very rare surname, Australia, and the United States. Likewise, Gannis is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Gannis | Greece, Australia, Indonesia, United States, Venezuela |
|
carla gannis American artist and professor, US |
|
| cassie gannis American racing driver, US (b. 1991) |
|