Lacy began as a Norman surname for people from Lassy in Normandy, a place name of uncertain, probably Gaulish origin; as a first name it is understood through the English word lace, so it reads as "lacy" or "delicate". Along with Lacey it was a soft country favorite in the 1980s and 1990s. In the United States Lacy entered the top 1000 in 2003 and peaked at number 826 that year, but it has faded since and stood at number 2597 in 2025 with 67 girls.