Kay is a distinctive girls' name in England & Wales, ranking #1312 in 2004 with 17 recorded births. The name reached its all-time peak in 1996 with 66 births ranking #448. Since 1996, the popularity has decreased by 74.2%. In 2004, approximately 1 in every 16,815 girls born was named Kay. STABLE Recent data shows the name is currently stable.