Pedigree

            /Roger de Mortimer
        /Edmund Mortimer
       |    \Philippa de Montagu
    /Edmund de Mortimer
   |   |    /Lionel Antwerp Plantagenet
   |    \Philippa Plantagenet
   |        \Elizabeth de Burgh
Lionel de Mortimer
   |    /Owen Glendower
    \Catherine Glendower
        \wife of Owen Glendower

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