Gruffydd ap Maredudd (1300–1319) Parents Maredudd ab Owain Children Siblings Cynan ap Maredudd Cynan ap Maredudd ap Rhys Grûg ap Rhys Gwladus ferch Maredudd ab Owain ap Gruffudd Efa ferch Maredudd Owain ap Maredudd Gwenllian ferch Maredudd ab Owain ap Gruffudd