Cognomen Дженнаро (Gennaro 
, Дженнаро 
) , in the world, is a common last name. The cognomen Дженнаро is habitual in Italy, where it is quite a common surname, Paraguay, where it is quite a rare surname, and Malta. In absolute terms, it is the most numerous in Italy, the United States, and Argentina. More prevalently, Дженнаро is the forename as well as the last name.