Kay is a distinctive girls' name in England & Wales, ranking #2636 in 2011 with 9 recorded births. The name reached its all-time peak in 1996 with 66 births ranking #448. Since 1996, the popularity has decreased by 86.4%. In 2011, approximately 1 in every 35,701 girls born was named Kay. STABLE Recent data shows the name is currently stable.