Fionn is a distinctive boys' name in England & Wales, ranking #757 in 2024 with 45 recorded births. The name reached its all-time peak in 2022 with 69 births ranking #555. Since 1996, the popularity has increased by 246.2%. In 2024, approximately 1 in every 6,173 boys born was named Fionn. FALLING Recent data shows the name is currently falling.