Niel is a distinctive boys' name in United States, ranking #13333 in 2025 with 5 recorded births. This places Niel in the bottom 4% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2001 with 13 births ranking #5585. Since 1996, the popularity has decreased by 50.0%. In 2025, approximately 1 in every 341,615 boys born was named Niel. FALLING Recent data shows the name is currently falling.