Lacy is a distinctive girls' name in England & Wales, ranking #946 in 2010 with 36 recorded births. The name reached its all-time peak in 2007 with 36 births ranking #866. Since 1996, the popularity has increased by 620.0%. In 2010, approximately 1 in every 8,918 girls born was named Lacy. RISING Recent data shows the name is currently rising.