Sydnee is a distinctive girls' name in United States, ranking #645 in 1997 with 346 recorded births. The name reached its all-time peak in 2003 with 506 births ranking #549. Since 1996, the popularity has increased by 21.0%. In 1997, approximately 1 in every 5,031 girls born was named Sydnee. FALLING Recent data shows the name is currently falling.