Susy is a distinctive girls' name in United States, ranking #18806 in 2015 with 5 recorded births. The name reached its all-time peak in 2007 with 18 births ranking #7365. Since 1996, the popularity has decreased by 54.5%. In 2015, approximately 1 in every 356,931 girls born was named Susy. FALLING Recent data shows the name is currently falling.