Efa ferch Maredudd Welsh noblewoman (fl. 1300), daughter of Maredudd ab Owain Parents Maredudd ab Owain Children Siblings Cynan ap Maredudd Cynan ap Maredudd ap Rhys Grûg ap Rhys Gwladus ferch Maredudd ab Owain ap Gruffudd Owain ap Maredudd Gwenllian ferch Maredudd ab Owain ap Gruffudd Gruffydd ap Maredudd