
1) British traditional history
Found on
https://www.crosswordclues.com/clue/hafren

Hafren was a legendary British princess who was drowned in the River Severn (Hafren; Habren) by her repudiated stepmother Gwendolen. The legend appears in Geoffrey of Monmouth`s pseudohistorical chronicle Historia Regum Britanniae. According to Geoffrey, Hafren is the eponym of the Severn, which bears one of Britain`s most ancient river names (r.....
Found on
http://en.wikipedia.org/wiki/Hafren
No exact match found.