Kelly is a moderately popular girls' name in England & Wales, ranking #338 in 2006 with 128 recorded births. The name reached its all-time peak in 1996 with 789 births ranking #74. Since 1996, the popularity has decreased by 83.8%. In 2006, approximately 1 in every 2,338 girls born was named Kelly. FALLING Recent data shows the name is currently falling.