Su is a distinctive girls' name in United States, ranking #10991 in 2002 with 9 recorded births. The name reached its all-time peak in 2015 with 15 births ranking #7959. Since 1996, the popularity has increased by 28.6%. In 2002, approximately 1 in every 199,647 girls born was named Su. RISING Recent data shows the name is currently rising.