The English and Irish surname Lacey is of Norman origin. The name is an habitational name from Lassy in Calvados, named from a Gaulish personal name Lascius. The surname is widespread in Britain and Ireland, but most common in Nottinghamshire. In Ireland the family is associated particularly with County Limerick. The name is first recorded in the Domesday Book of 1086. In the New World the name is first recorded in New England when Lawrence Lacey arrived in 1620. Today there are approximately 18,000 bearers of the name Lacey living in the United States.