Nanci is a distinctive girls' name in United States, ranking #7335 in 2011 with 17 recorded births. The name reached its all-time peak in 2001 with 59 births ranking #2590. Since 1996, the popularity has decreased by 64.6%. In 2011, approximately 1 in every 103,459 girls born was named Nanci. FALLING Recent data shows the name is currently falling.