Last name О'Доннелл (O'Donnell 
, О'Доннелл 
) , globally, is a common cognomen. The last name О'Доннелл is habitual in Ireland, where it is a common surname, Bermuda, where it is quite a common surname, and Australia (explore the name in all countries). In absolute terms, this name is the most popular in the United States, Australia, and the United Kingdom.