The arms are those of Holland quartering arms borne by the descendants of Gryffudd ap Cynan (d. 1137), Ednywain Bendew, Owain Gwynedd (1100-1170) Prince of Gwynedd, Ednyfed Fychan (d. 1246), Cynwrig Fychan ap Cynwrig ap Madog of Wepre, Rogert ap Gruffudd ap Hywel ap Gronwy ab Ednyfed Fychan, Rhiwallon ap Dingwall ap Tudor Trefor and Caradog Freichfras.