Cognomen Giannitsakis (Giannitsakis 
) , all over the world, is a rare family name. The surname Giannitsakis is characteristic of Greece, where it is a rare surname, and Germany, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Giannitsakis | Germany, Greece |
Stratos, Simonida, Georgios, Dimitrios, Anastasios, and Panagiotis