In the entire world, Zilka (Zilka 
) is a rare largely girly, but uncommonly boy's forename. The first name Zilka is characteristic of Panama, where it is a rare feminine name, Israel, where it is a rare principally feminine, but scarcely boy's name, and Brazil, where it is a very rare gender-neutral name. In absolute terms, the name is most common in Brazil, Indonesia, and Panama. More frequently, Zilka is the last name as well as the forename.