sentences:  Dafydd Llwyd ap Llywelyn ap Gruffudd (Dafydd Llwyd o Fathafarn)
  
  Dafydd Llwyd ap Llywelyn ap Gruffudd, usually referred to as Dafydd Llwyd o Fathafarn (fl.c.1400–c.1490) was a Welsh language poet, a native of Mathafarn, Powys.