Su is a distinctive girls' name in United States, ranking #10816 in 2025 with 9 recorded births. This places Su in the bottom 37% of ranked US girls' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2015 with 15 births ranking #7959. Since 1996, the popularity has increased by 28.6%. In 2025, approximately 1 in every 178,585 girls born was named Su. RISING Recent data shows the name is currently rising.