Surname Cefo (Cephus 
, Cefo 
) , around the world, is a rare cognomen. The last name Cefo is habitual in the United States, where it is a rare surname, New Zealand, and Colombia, where it is a very rare surname. In absolute terms, it is the most numerous in the United States, Colombia, and Argentina. Likewise, Cefo is the forename as well as the last name.