Cydney is a distinctive girls' name in United States, ranking #3785 in 2015 with 40 recorded births. The name reached its all-time peak in 1998 with 227 births ranking #921. Since 1996, the popularity has decreased by 81.1%. In 2015, approximately 1 in every 44,616 girls born was named Cydney. STABLE Recent data shows the name is currently stable.