Cidney is a distinctive girls' name in United States, ranking #2479 in 1999 with 58 recorded births. The name reached its all-time peak in 1999 with 58 births ranking #2479. Since 1996, the popularity has increased by 65.7%. In 1999, approximately 1 in every 30,582 girls born was named Cidney. FALLING Recent data shows the name is currently falling.