Soo is a distinctive girls' name in United States, ranking #17605 in 2001 with 5 recorded births. The name reached its all-time peak in 1996 with 9 births ranking #9483. Since 1996, the popularity has decreased by 44.4%. In 2001, approximately 1 in every 360,112 girls born was named Soo. FALLING Recent data shows the name is currently falling.