Parent’s name
Shannon surname meaning
An Irish surname from Gaelic Ó Seanáin, “descendant of Seanán,” a pet form based on seán “old”; also a shortened form of Shanahan or Mac Giolla tSeanáin.
The short story
Shannon is an Irish surname most often from Gaelic Ó Seanáin, “descendant of Seanán,” a personal name built as a pet form from seán, “old.” It can also be a shortened form of Shanahan or, in County Clare, of Mac Giolla tSeanáin, “son of the servant of St. Seanán.” Shannan and related spellings appear in Scotland after medieval Irish settlement. The famous River Shannon is a separate place-name and is not the main scholarly explanation for the family name. Parent’s name is high confidence for the catalog.
Also seen as: Shannon, Shannan, Ó Seanáin, Shanahan
Sources used
- Ancestry / DAFN surname meaning for Shannon (Ó Seanáin; Shanahan; Mac Giolla tSeanáin)
- Geneanet DAFN entry for Shannon (Irish patronymic routes)
- Names2020_LastNames_RaceHispanic_Top1000.xlsx (2020 Census)