Family name Corneus (Corni 
, Corneo 
, Corneus 
) , worldwide, is quite a rare surname. The family name Corneus is characteristic of Italy, where it is quite a rare surname, Romania, where it is a rare surname, and Brazil. Measured by absolute frequency, it is commonest in Italy, Brazil, and Indonesia. Very seldom, Corneus is the forename as well as the last name.