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LYSAGHT Family HistoryRecorded in the spellings of MacLysaght, McLysaght, and Lysaght as well as possibly Lycettt and Lysett, this is a surname of Irish origins. It is derived from the pre 10th century Gaelic 'Giolla Iasachta' meaning 'loaned people'. The MacLysaghts were a sub-set of the Dalcassian sept of O' Brien of Thomond, and it is believed that the original namebearers may have been 'loaned' by the O' Briens as fighting men. The surname is mainly found in Counties Clare, Limerick and Cork. To some extent the prefix 'Mac' has fallen into disuse down through the centuries, but however spelt name holders have been well represented in the history of Ireland.
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