Cognomen Onys (Onys 
, Онис 
) , worldwide, is a very rare surname. The last name Onys is characteristic of Latin America and the Caribbean, particularly Honduras, where it is a rare surname, Nicaragua, where it is a very rare surname, and Venezuela. Measured by absolute frequency, it most frequently occurs in Honduras, Russia, and Ukraine. Likewise, Onys is the forename as well as the last name.