- Branwen is also the name of a character in some versions of Tristan and Iseult.
Branwen, Daughter of Llyr is a major character in the
Second Branch of the
Mabinogi, which is sometimes called the
Mabinogi of Branwen after her. Branwen is a daughter of
Llyr and
Penarddun. She is married to the King of Ireland, but the marriage does not bring peace.