Lacy is a distinctive girls' name in England & Wales, ranking #1500 in 2005 with 15 recorded births. The name reached its all-time peak in 2007 with 36 births ranking #866. Since 1996, the popularity has increased by 200.0%. In 2005, approximately 1 in every 19,217 girls born was named Lacy. RISING Recent data shows the name is currently rising.