He was educated at Ysgol Gyfun Llangefni and the Royal Welsh College of Music & Drama. Gwynfryn and his wife Anja had five children, one of whom is musician and broadcaster H. Hawkline; Anja died on 6 October 2018 from cancer.
Gwynfryn's educational background was at Ysgol Gyfun Llangefni and the Royal Welsh College of Music & Drama. Gwynfryn and his wife Anja had five children, including musician H. Hawkline; tragically, Anja lost her battle with cancer on 6 October 2018.