1333 -Earl William was killed at Carrickfergus, and his infant daughter and heir...

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1333 -Earl William was killed at Carrickfergus, and his infant daughter and heiress was brought to England where she afterwards married Lionel, Duke of Clarence. From him the Earldom passed to the family of Mortimer and the House of York, and on the accession 1461 of Edward IV finally merged in the Crown (Journal R.S.A.I., 1913, Pt. I.) Celt : Dromore and Ulster Diocese by E.D. Atkinson

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