Little deer
Derived from the Irish word 'os', meaning deer, combined with a diminutive suffix. In Irish mythology, Oisin was a legendary poet-warrior and the son of Fionn mac Cumhaill.
About 22 boys were named Oisin in 2025.
The legendary poet and hero of the Fenian Cycle · Irish Mythology
Champion British flat racing jockey
Renowned Irish sculptor
Irish writer and illustrator of children's books
US births per 5-year period, 1990–present (SSA data).
