Meaning and history
Fionn comes from the Old Irish name Finn, derived from finn meaning “white, blessed.” It appears often in Irish history and legend, most notably in Fionn mac Cumhaill, the central figure of the Fenian Cycle, one of the four main cycles of Irish mythology. Born as Deimne, he gained his nickname from his fair hair, became all-wise after eating an enchanted salmon, and later led the Fianna after defeating the fire-breathing demon Áillen. He was the father of Oisín and the grandfather of Oscar.
20062006: 18 births, rank #4,865
2007: 20 births, rank #4,640
2008: 29 births, rank #3,646
2009: 29 births, rank #3,639
2010: 25 births, rank #3,994
20112011: 25 births, rank #3,994
2012: 37 births, rank #3,059
2013: 28 births, rank #3,661
2014: 24 births, rank #4,138
2015: 31 births, rank #3,513
20162016: 29 births, rank #3,681
2017: 33 births, rank #3,378
2018: 40 births, rank #2,943
2019: 25 births, rank #4,114
2020: 23 births, rank #4,275
20212021: 40 births, rank #3,021
2022: 28 births, rank #3,879
2023: 31 births, rank #3,629
2024: 22 births, rank #4,571
20252025: 25 births, rank #4,139
In 2025, 25 babies were recorded with the name Fionn, ranking #4,139 among boys.