Cydney is a distinctive girls' name in United States, ranking #5349 in 2018 with 24 recorded births. The name reached its all-time peak in 1998 with 227 births ranking #921. Since 1996, the popularity has decreased by 88.7%. In 2018, approximately 1 in every 70,851 girls born was named Cydney. STABLE Recent data shows the name is currently stable.