Sydne is a distinctive girls' name in United States, ranking #6220 in 2005 with 20 recorded births. The name reached its all-time peak in 1996 with 59 births ranking #2278. Since 1996, the popularity has decreased by 66.1%. In 2005, approximately 1 in every 92,385 girls born was named Sydne. FALLING Recent data shows the name is currently falling.