Sydne is a distinctive girls' name in United States, ranking #2983 in 1999 with 45 recorded births. The name reached its all-time peak in 1996 with 59 births ranking #2278. Since 1996, the popularity has decreased by 23.7%. In 1999, approximately 1 in every 39,417 girls born was named Sydne. FALLING Recent data shows the name is currently falling.