Lacey, de Lacy, Leacy, ó Laitheasa A surname of Anglo-Norman origin. Families of this name were granted territory in Meath and in Limerick. The Gaelic sept ó Flaitheasa, derived from Flaith meaning ‘prince’, subsequently ó Laitheasa of Wexford is so anglicised. In 1890 Lacey was principallly found in Wexford, Dublin and Galway, and the estimated number of bearers was 2,240 (all variants). In the United States Lacy is the 1,263rd most numerous surname with an estimated 27,500 bearers, and Lacey is the 1,682nd most numerous surname with an estimated 19,250 bearers.
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