Sun is a distinctive girls' name in United States, ranking #16984 in 2025 with 5 recorded births. The name reached its all-time peak in 2000 with 11 births ranking #9090. Since 1996, the popularity has decreased by 37.5%. In 2025, approximately 1 in every 321,453 girls born was named Sun. FALLING Recent data shows the name is currently falling.