Milly is a distinctive girls' name in England & Wales, ranking #581 in 2021 with 67 recorded births. The name reached its all-time peak in 2004 with 460 births ranking #116. Since 1996, the popularity has increased by 36.7%. In 2021, approximately 1 in every 4,090 girls born was named Milly. FALLING Recent data shows the name is currently falling.