Two entries with the name Bradwen.
Bradwen
Son of Iaen; brother of Sulyen, Teregud, Moren, Siawn, and Caradawg; and one of Arthur’s warriors from Caer Dathal.
He was related to Arthur through Uther.
Source
Culhwch and Olwen | Late 11th century
Bradwen
Bratwen
Son of Moren Mynawg and one of Arthur’s warriors. The name Bratwen appears in the Stanzas of the Graves.
In the Y Gododdin he is one of the warriors at the Battle of Catraeth, where he is killed.
Source
Culhwch and Olwen | Late 11th century