Pedigree

            /Gilbert Marshall
        /John FitzGilbert
       |    \.... de Venuz
    /William Marshal
   |   |    /Walter de Salisbury
   |    \Sybil de Salisbury
   |        \Sibyl de Chaworth
Maud Marshal
   |        /Gilbert fitz Gilbert de Clare
   |    /Richard fitz Gilbert de Clare
   |   |    \Isabel\Elizabeth de Beaumont
    \Isabel de Clare
       |    /Dermot MacMurrough
        \Eve of Leinster
            \Mor ingen Muirchertaig Ua Tuathail

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