Fynn is a moderately popular boys' name in England & Wales, ranking #477 in 2005 with 58 recorded births. The name reached its all-time peak in 2008 with 71 births ranking #489. Since 1996, the popularity has increased by 427.3%. In 2005, approximately 1 in every 5,335 boys born was named Fynn. FALLING Recent data shows the name is currently falling.