Sianni is a distinctive girls' name in United States, ranking #9324 in 2009 with 13 recorded births. The name reached its all-time peak in 2025 with 128 births ranking #1629. Since 1996, the popularity has increased by 85.7%. In 2009, approximately 1 in every 141,298 girls born was named Sianni. RISING Recent data shows the name is currently rising.