Gruffydd ap Rhys ap Thomas Welsh knight (1478–1521) Parents Efa ap Henry Rhys ap Thomas Children Rhys ap Gruffydd Elis ferch Gruffudd ap Rhys Siblings Margred 'Ieuaf' ferch Sir Rhys ap Thomas Gwenllian ferch Rhys ap Thomas Sir William ap Rhys Margaret ap Thomas Dafydd ap Rhys ap Thomas of Trericert Partners Catherine St. John