Katy is a moderately popular girls' name in England & Wales, ranking #111 in 1996 with 413 recorded births. This places Katy in the top 2% of ranked UK girls' names for the year. Its actual usage is classified as Moderately Popular. The name reached its all-time peak in 1996 with 413 births ranking #111. In 1996, approximately 1 in every 717 girls born was named Katy. FALLING Recent data shows the name is currently falling.