Cognomen Джеро (Jero 
, Gero 
, Джеро 
) , across the world, is a common last name. The surname Джеро is characteristic of Hungary, where it is quite a common surname, Albania, where it is quite a rare surname, and Serbia. In absolute terms, it is commonest in Hungary, Ethiopia, and the United States. More prevalently, Джеро is the forename as well as the last name.