Cidney is a distinctive girls' name in United States, ranking #7288 in 2010 with 17 recorded births. The name reached its all-time peak in 1999 with 58 births ranking #2479. Since 1996, the popularity has decreased by 51.4%. In 2010, approximately 1 in every 104,549 girls born was named Cidney. FALLING Recent data shows the name is currently falling.