Sheehan is an Irish surname that has been used as a given name, particularly in the United States. Sheehan means 'descendant of the peaceful one.' which refers to an old or wise person. Over time, the use of Sheehan as a first name has increased, . The cultural significance of the name 'Sheehan' is not explicitly defined in the provided sources; it is derived from 'O'Séaghdha', which means 'descendant of Séaghdha.
