Lacy is a distinctive girls' name in England & Wales, ranking #3252 in 2015 with 7 recorded births. The name reached its all-time peak in 2007 with 36 births ranking #866. Since 1996, the popularity has increased by 40.0%. In 2015, approximately 1 in every 43,989 girls born was named Lacy. RISING Recent data shows the name is currently rising.