Cydney is a distinctive girls' name in United States, ranking #2594 in 2011 with 69 recorded births. The name reached its all-time peak in 1998 with 227 births ranking #921. Since 1996, the popularity has decreased by 67.5%. In 2011, approximately 1 in every 25,490 girls born was named Cydney. STABLE Recent data shows the name is currently stable.