Fionn is a distinctive boys' name in England & Wales, ranking #628 in 2017 with 57 recorded births. This places Fionn in the top 10% of ranked UK boys' names for the year. Its actual usage is classified as Uncommon. The name reached its all-time peak in 2022 with 69 births ranking #555. Since 1996, the popularity has increased by 338.5%. In 2017, approximately 1 in every 5,664 boys born was named Fionn. STABLE Recent data shows the name is currently stable.