Surname О'Ши (O'Shea 
, О'Ши) , worldwide, is a common last name. The last name О'Ши is characteristic of Ireland, where it is a common surname, Jersey, where it is quite a common surname, and Australia. Measured by absolute frequency, this name is the most popular in Ireland, Australia, and the United States. Very seldom, О'Ши is the forename as well as the last name.