Elizabeth Ferrers
Elizabeth was married first to William Marshal , 2nd Baron Marshal , and after his death to Dafydd ap Gruffydd , a prince of Gwynedd and brother of Llywelyn ap Gruffudd . 
<triplet> Dafydd ap Gruffydd <subj> Llywelyn ap Gruffudd <obj> sibling <triplet> Llywelyn ap Gruffudd <subj> Dafydd ap Gruffydd <obj> sibling