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| de Lacy | rare: scattered. Ir. de Léis. Hugo de Lacy acquired the Kingdom of Meath at the Invasion, but the name is mainly identified with Co. Limerick. IF & SGG. |
| Lacey | numerous: South East, E Leinster, N Munster etc. Ir. de Léis. Anglo-Normans in Meath (12 cent) and Limerick, perhaps two separate families; also Ir. Ó Laitheasa in Wexford. This is Ó Flaitheasa (ruler-choice) with "F" aspirated. SI, IF & SGG. |
| Lacy | Quite numerous: Midlands etc. As Lacey. Reaney states that the name is from Lassy in Normandy. DBS. |
| Leacy | Quite numerous: Wexford etc. Ir. Ó Laitheasa from Flaitheas, principality. A sept of Wexford which predates the Norman Lacey, q.v. SGG. |
| Leavy | numerous: Midlands etc. Ir. Mac Con Shléibhe (hound of the mountain). They were a sept of Longford related to the O'Farrells. SI. |
Parishes where Leesy and a second surname are both baptised.
This list shows total Leesy Roman Catholic baptisms by county.
Click on the county to see detail.