Surname Onisa (Onisa 
, โอนิสา ) , in the entire world, is a rare cognomen. The cognomen Onisa is characteristic of Romania, where it is quite a rare surname, Hungary, where it is a very rare surname, and Nigeria. Measured by absolute frequency, this name is the most popular in Romania, Nigeria, and Philippines. Also, Onisa is the forename as well as the last name.