Susy is a distinctive girls' name in United States, ranking #7185 in 1999 with 14 recorded births. The name reached its all-time peak in 2007 with 18 births ranking #7365. Since 1996, the popularity has increased by 27.3%. In 1999, approximately 1 in every 126,699 girls born was named Susy. FALLING Recent data shows the name is currently falling.