The Bonedd Gwŷr y Gogledd records him as a descendent of Dyfnwal Hen of Alt Clut, though the genealogy is much confused (Gauran is given as his son, rather than father).
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Though this triad, like the Bonedd Gwŷr y Gogledd, flips father and son's names as Gauran map Aedan, Bromwich p. 64 takes it as a reference to Áedán rather than his father.