Sinnott, Synnott, Sinóid A surname of English origin from the Old English meaning ‘victory-bold’. They came to Ireland at the time of the Cambro-Norman invasion and settled principally in Wexford. In 1890 the surname was principally found in Wexford (Sinnott) and Dublin (Synnott), and the estimated number of bearers was 1,660.
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