Nilsa is a distinctive girls' name in United States, ranking #14106 in 2005 with 7 recorded births. The name reached its all-time peak in 1996 with 13 births ranking #7024. Since 1996, the popularity has decreased by 46.2%. In 2005, approximately 1 in every 263,957 girls born was named Nilsa. FALLING Recent data shows the name is currently falling.