Kelly is a moderately popular girls' name in England & Wales, ranking #436 in 2008 with 97 recorded births. The name reached its all-time peak in 1996 with 789 births ranking #74. Since 1996, the popularity has decreased by 87.7%. In 2008, approximately 1 in every 3,255 girls born was named Kelly. FALLING Recent data shows the name is currently falling.