Arthur's paternal branch is taken from the Mostyn Manuscript 117 (online version). Arthur's maternal line is given in the Vitellius C.IX manuscript as given by Bromwich*. Gvenhvyuar's father is given in two triads*. Llacheu is denoted as Arthur's son pretty much everywhere he appears in Welsh literature, while Duran is rather more speculative and based on one verse. See the sons' notes for details. For the critical discussion of the sources see this Note.