Cadwaladr's attempt to reclaim his lands with the help of a Danish fleet in 1144 forms the background to The Summer of the Danes by Ellis Peters in the Brother Cadfael series.
It was the first book in a series of twenty to introduce the fictional Brother Cadfael, the real Prior Robert Pennant, and the rest of the monks at Shrewsbury Abbey in the 12th century.
Madog's intervention in the Battle of Lincoln in 1141 forms an important plot element in the detective novel Dead Man's Ransom, part of the Brother Cadfael chronicles by Edith Pargeter (writing as Ellis Peters).
Óttar, the Irish spelling Otir is used, appears as a character in The Summer of the Danes by Ellis Peters in the Brother Cadfael series.
Owain is a recurring character in the Brother Cadfael series of novels by Ellis Peters, often referred to, and appearing in the novels Dead Man's Ransom and The Summer of the Danes.
A rebec featured prominently in one of Ellis Peters' (12th century) Brother Cadfael stories: Liliwin, the title character of The Sanctuary Sparrow, earned his living by playing that instrument.
The moving of Winifred's bones to Shrewsbury is fictionalized in A Morbid Taste for Bones, the first of Ellis Peters' Brother Cadfael novels, with the plot twist that her bones are secretly left in Wales, and someone else is put into the shrine.
Brother Cadfael | The Cadfael Chronicles | Cadfael | Brother Cadfael's Penance |
The "Cadfael" series eventually extended to thirteen 75-minute episodes, all of which starred Sir Derek Jacobi as the sleuthing monk.
•
The book was also adapted for BBC Radio 4 in 1990, starring Glyn Houston as Brother Cadfael and Geoffrey Whitehead as Adam Courcelles.