Sydni is a distinctive girls' name in United States, ranking #3695 in 2015 with 42 recorded births. The name reached its all-time peak in 2000 with 468 births ranking #559. Since 1996, the popularity has decreased by 82.1%. In 2015, approximately 1 in every 42,492 girls born was named Sydni. RISING Recent data shows the name is currently rising.