Fenn is a distinctive boys' name in United States, ranking #10067 in 2023 with 7 recorded births. This places Fenn in the bottom 29% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2025 with 10 births ranking #7840. In 2023, approximately 1 in every 244,079 boys born was named Fenn. RISING Recent data shows the name is currently rising.