Sydnee is a distinctive girls' name in United States, ranking #549 in 2003 with 506 recorded births. The name reached its all-time peak in 2003 with 506 births ranking #549. Since 1996, the popularity has increased by 76.9%. In 2003, approximately 1 in every 3,611 girls born was named Sydnee. FALLING Recent data shows the name is currently falling.