Pedigree

            /Hugh De MORTIMER
        /Roger de Mortimer
       |    \Maud LONGESPIC
    /Ralph de Mortimer
   |   |    /Sir William de Ferrers
   |    \Isabel de Ferrers
   |        \Sybil Marshal
Roger De MORTIMER
   |        /Iorwerth (Jorwerth) Ap Owain
   |    /Llewellan of North NORTH WALES
   |   |    \Margaret of Powys MADOG (MARET)
    \Gladys Dhu Verch Llewellyn
       |    /John "Lackland" King England
        \of England Joan
            \Agatha de Ferrers

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