Trallwch
The name of Tristan’s father in Welsh tradition.
It may be a Welsh form of either of the Pictish names Talorc or Talorcan, but this cannot be said with certainty. An actual king named Talorch, father of Drust, ruled the Picts in the late eighth century.
See also
Drustwrn Hayarn | The Legend of King Arthur
Sources
Triads of the Island of Britain (Welsh ”Triads”) | 11th century to 14th century
Breudwyt Rhonabwy | 13th century
Welsh Tristan fragment | c. 1550