Cydney is a distinctive girls' name in United States, ranking #1259 in 2003 with 166 recorded births. The name reached its all-time peak in 1998 with 227 births ranking #921. Since 1996, the popularity has decreased by 21.7%. In 2003, approximately 1 in every 11,006 girls born was named Cydney. STABLE Recent data shows the name is currently stable.