Worldwide, Santonastasio (Santonastasio 
) is an extremely rare unknown gender first name. Much more frequently, Santonastasio is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Santonastasio | Costa Rica, Italy, Spain, United States, Brazil |
Ida, Michael, Michele, Antonio, Aniello, Adriana, Carmela, Corrine, Claudio, Brigida, Gaetano, Vincent, Viviann, Michaela, Angyalex, Cristina, Patrizia, Raffaele, Danielle, Domenico, Giovanni, Giuseppe, Matilde, Maryluo, Olivia, Pietro, Mary, Anna, Ciro, Rosa, Dawn, John, Tina, Maria, Mario, Marco, Emanuele, Carla, Luigi, Titti, Noemi, Marica, Maryka, Marzia, Andrea, Angela, Carola, Biagio, Rocco, and Vincenzo