Cydney is a distinctive girls' name in England & Wales, ranking #748 in 2000 with 31 recorded births. This places Cydney in the top 15% of ranked UK girls' names for the year. Its actual usage is classified as Uncommon. The name reached its all-time peak in 2003 with 46 births ranking #630. In 2000, approximately 1 in every 8,812 girls born was named Cydney. FALLING Recent data shows the name is currently falling.