In the Icelandic Saga af Tristram ok Ísodd, a king who managed to wrest control of Tristan’s homeland, Spain, during the chaos that followed the defeat of Biríng, Tristan’s foster-father, at the hands of King Turnes of Africa.
Tristan eventually defeated Beniosus and his companions, Earls Hríngr and Siguròr, and re-conquered Spain.
Source
Saga af Tristram ok Isodd | 14th century