Sydnie is a distinctive girls' name in United States, ranking #672 in 1999 with 341 recorded births. The name reached its all-time peak in 2000 with 352 births ranking #681. Since 1996, the popularity has increased by 45.1%. In 1999, approximately 1 in every 5,202 girls born was named Sydnie. FALLING Recent data shows the name is currently falling.