All around the world, Isonia (Isonia 
) is a rare feminine first name. The forename Isonia is characteristic of Brazil, where it is a very rare feminine name, Italy, and the United States, where it is an extremely rare feminine name. Very seldom, Isonia is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Isonia | South Africa, Italy, United States, Brazil, Venezuela |
Sa, Curtis, Kruger, Knight, Gesser, Ergang, Serrano, Aurelio, Conrado, Barbosa, Trebien, Omizzolo, Mallmann, Mckinney, Coluccia, Bergmann, Trindade, Fruhling, Oliveira, Bortolini, Formentin, Bartolomei, Coelho, Santos, Muller, Zwang, Mohr, Solf, Soto, Cole, Kern, Knak, Rosa, Lima, Timm, Hein, Bellaguarda, Horn, Salve, Silva, Senen, Sousa, Souza, Schio, Adams, Costa, Ricks, Jones, Hoff, and Lautenschleiger