Nanci is a distinctive girls' name in United States, ranking #2590 in 2001 with 59 recorded births. The name reached its all-time peak in 2001 with 59 births ranking #2590. Since 1996, the popularity has increased by 22.9%. In 2001, approximately 1 in every 30,518 girls born was named Nanci. FALLING Recent data shows the name is currently falling.