Logan A Scottish surname derived from the placname Logan in Ayrshire. May also be the anglicisation of the Gaelic ó Leocháin a sept of Meath who were chiefs of Gailenga Móra and Luighne, now the Baronies of Morgallion and Lune, who were dispossessed about the time of the Cambro-Norman invasion. In 1890 Logan was principally found in Antrim, and the estimated number of bearers was 2,465.
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