Sydne is a distinctive girls' name in United States, ranking #4823 in 2001 with 25 recorded births. The name reached its all-time peak in 1996 with 59 births ranking #2278. Since 1996, the popularity has decreased by 57.6%. In 2001, approximately 1 in every 72,022 girls born was named Sydne. FALLING Recent data shows the name is currently falling.