Milly is a distinctive girls' name in England & Wales, ranking #792 in 2025 with 46 recorded births. This places Milly in the top 10% of ranked UK girls' names for the year. Its actual usage is classified as Uncommon. The name reached its all-time peak in 2004 with 460 births ranking #116. In 2025, approximately 1 in every 5,506 girls born was named Milly. FALLING Recent data shows the name is currently falling.