Kathy is a distinctive girls' name in United States, ranking #647 in 1999 with 361 recorded births. The name reached its all-time peak in 1996 with 445 births ranking #530. Since 1996, the popularity has decreased by 18.9%. In 1999, approximately 1 in every 4,914 girls born was named Kathy. FALLING Recent data shows the name is currently falling.