Sheehy, Mac Sithigh According to MacLysaght a galloglass family from the Clan McDonald which settled in Munster. In 1890 Sheehy was principally found in Kerry, Limerick and Cork, and the estimated number of bearers was 2,464. In the United States Sheehy is the 9,501st most numerous surname with an estimated 2,750 bearers.
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