Niel is a distinctive boys' name in United States, ranking #9294 in 1998 with 6 recorded births. The name reached its all-time peak in 2001 with 13 births ranking #5585. Since 1996, the popularity has decreased by 40.0%. In 1998, approximately 1 in every 318,553 boys born was named Niel. FALLING Recent data shows the name is currently falling.