Su is a distinctive girls' name in United States, ranking #13892 in 1998 with 6 recorded births. The name reached its all-time peak in 2015 with 15 births ranking #7959. Since 1996, the popularity has decreased by 14.3%. In 1998, approximately 1 in every 294,482 girls born was named Su. RISING Recent data shows the name is currently rising.