Milly is a moderately popular girls' name in England & Wales, ranking #163 in 2008 with 327 recorded births. The name reached its all-time peak in 2004 with 460 births ranking #116. Since 1996, the popularity has increased by 567.3%. In 2008, approximately 1 in every 966 girls born was named Milly. FALLING Recent data shows the name is currently falling.