Nanci is a distinctive girls' name in United States, ranking #3515 in 1997 with 33 recorded births. The name reached its all-time peak in 2001 with 59 births ranking #2590. Since 1996, the popularity has decreased by 31.3%. In 1997, approximately 1 in every 52,747 girls born was named Nanci. FALLING Recent data shows the name is currently falling.