The name Vaughan in Ireland is derived from either Welsh settlers who arrived into the country in the seventeenth century or from native Gaelic Septs that adopted Vaughan as the anglicized version of their name. The O'Beachain Sept from County Clare was one such Sept who did this as was the O'Mochain Sept of County Kilkenny who more usually anglicized their name as Moghan or Moughan.