Tilly is a moderately popular girls' name in England & Wales, ranking #165 in 2024 with 307 recorded births. The name reached its all-time peak in 2009 with 703 births ranking #86. Since 1996, the popularity has increased by 192.4%. In 2024, approximately 1 in every 840 girls born was named Tilly. STABLE Recent data shows the name is currently stable.