Sydne is a distinctive girls' name in United States, ranking #2550 in 1997 with 51 recorded births. The name reached its all-time peak in 1996 with 59 births ranking #2278. Since 1996, the popularity has decreased by 13.6%. In 1997, approximately 1 in every 34,131 girls born was named Sydne. FALLING Recent data shows the name is currently falling.