Lacy is a distinctive boys' name in United States, ranking #4945 in 2003 with 16 recorded births. The name reached its all-time peak in 2003 with 16 births ranking #4945. Since 1996, the popularity has increased by 23.1%. In 2003, approximately 1 in every 123,454 boys born was named Lacy. RISING Recent data shows the name is currently rising.