From Lassy, France
Originally a Norman French surname, it refers to the town of Lassy in Calvados, France. It was brought to England during the Norman Conquest and eventually transitioned from a surname to a feminine given name.
Less common today
Lacy isn't in the latest US Top 1000. It last peaked at #355 in 1990.
American country music singer and songwriter
American actress known for Mean Girls
Former U.S. Representative from Missouri
US births per 5-year period, 1990βpresent (SSA data).