Worldwide, Silca (Silca 
) is a rare unisex given name. The given name Silca is characteristic of Brazil, where it is a very rare gender-neutral name, Philippines, where it is a very rare feminine name, and China, where it is an extremely rare boy's name. Likewise, Silca is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Silca | Portugal, Spain, Brazil, United States, Romania |