Sydni is a distinctive girls' name in United States, ranking #559 in 2000 with 468 recorded births. The name reached its all-time peak in 2000 with 468 births ranking #559. Since 1996, the popularity has increased by 99.1%. In 2000, approximately 1 in every 3,880 girls born was named Sydni. RISING Recent data shows the name is currently rising.