Sydnee is a distinctive girls' name in United States, ranking #626 in 1998 with 376 recorded births. The name reached its all-time peak in 2003 with 506 births ranking #549. Since 1996, the popularity has increased by 31.5%. In 1998, approximately 1 in every 4,699 girls born was named Sydnee. FALLING Recent data shows the name is currently falling.