Milly is a distinctive girls' name in England & Wales, ranking #519 in 2019 with 78 recorded births. The name reached its all-time peak in 2004 with 460 births ranking #116. Since 1996, the popularity has increased by 59.2%. In 2019, approximately 1 in every 3,590 girls born was named Milly. FALLING Recent data shows the name is currently falling.