In the entire world, Onisa (Onisa 
, โอนิสา ) is a rare epicene forename. The first name Onisa is characteristic of Nigeria, where it is a very rare gender-neutral name, Tanzania, where it is a very rare feminine name, and Colombia. Measured by absolute frequency, it is commonest in Nigeria, India, and Tanzania. Also, Onisa is the last name as well as the forename.