In the entire world, Onica (Onica 
, Оника 
, Оница ) is quite a rare mostly feminine, but seldom masculine first name. The given name Onica is characteristic of South Africa, where it is quite a rare girly name, Trinidad and Tobago, and Romania, where it is quite a rare unisex name. Not in comparison with a country's population, it is the most numerous in South Africa, Romania, and China. Also, Onica is the last name as well as the forename.