Cydney is a distinctive girls' name in United States, ranking #10273 in 2025 with 9 recorded births. This places Cydney in the bottom 41% of ranked US girls' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 1998 with 227 births ranking #921. Since 1996, the popularity has decreased by 95.8%. In 2025, approximately 1 in every 178,585 girls born was named Cydney. STABLE Recent data shows the name is currently stable.