Nanci is a distinctive girls' name in United States, ranking #6499 in 2008 with 21 recorded births. The name reached its all-time peak in 2001 with 59 births ranking #2590. Since 1996, the popularity has decreased by 56.3%. In 2008, approximately 1 in every 90,034 girls born was named Nanci. FALLING Recent data shows the name is currently falling.