Cydney is a distinctive girls' name in United States, ranking #1527 in 2005 with 135 recorded births. The name reached its all-time peak in 1998 with 227 births ranking #921. Since 1996, the popularity has decreased by 36.3%. In 2005, approximately 1 in every 13,687 girls born was named Cydney. STABLE Recent data shows the name is currently stable.