Question: Who is Gwenllian Of Wales's paternal grandfather?
Sentence (from "Llywelyn ap Gruffudd"): Llywelyn ap Gruffydd (c. 1223 – 11 December 1282), sometimes written as Llywelyn ap Gruffudd, also known as Llywelyn the Last or Llywelyn Yr Ail (Llywelyn II) , was Prince of Wales  from 1258 until his death at Cilmeri in 1282.
Relevant evidence: No