Mac Geoghegan, Conall (Conall Mac Eochagáin) (fl. 1620-1640), historian and translator. He lived in what appear to have been reasonably prosperous circumstances in Lismoyny, Co. Westmeath. In 1627 he translated the Annals of Clonmacnoise into English, from an original now lost. In 1636 Mac Geoghegan made transcriptions from the Book of Lecan probably at the request of James Ussher, who lent him the manuscript.

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