Nanci is a distinctive girls' name in United States, ranking #2731 in 2000 with 54 recorded births. The name reached its all-time peak in 2001 with 59 births ranking #2590. Since 1996, the popularity has increased by 12.5%. In 2000, approximately 1 in every 33,629 girls born was named Nanci. FALLING Recent data shows the name is currently falling.