Sydni is a distinctive girls' name in United States, ranking #611 in 1999 with 397 recorded births. The name reached its all-time peak in 2000 with 468 births ranking #559. Since 1996, the popularity has increased by 68.9%. In 1999, approximately 1 in every 4,468 girls born was named Sydni. RISING Recent data shows the name is currently rising.