Cognomen Келлі (Kelly 
, Kelli 
, Келлі 
) , across the world, is a widespread family name. The cognomen Келлі is habitual in Ireland, where it is a widespread surname, Aruba, and Saint Kitts and Nevis, where it is a common surname (explore the name in all countries). In absolute terms, it most frequently occurs in the United States, the United Kingdom, and Ireland. More frequently, Келлі is the forename as well as the last name.