Nanci is a distinctive girls' name in United States, ranking #3206 in 1998 with 39 recorded births. The name reached its all-time peak in 2001 with 59 births ranking #2590. Since 1996, the popularity has decreased by 18.8%. In 1998, approximately 1 in every 45,305 girls born was named Nanci. FALLING Recent data shows the name is currently falling.