Thegueth came with the first Methllerk, still at the breast, in House Giasrial. He was cautious, greedy and proud, with a gift for leading others. In the summer of year 5 he married Losde, and was widowed in the autumn of year 39. In the autumn of year 39 he married Ganmand, and was widowed in the winter of year 39. In the winter of year 39 he married Lainchon. In year 14 he was briefly at the head of Llaness. From year 14 he was ruler of the Methllerk until his death. He decided to raise houses (26 times), to build a granary (2 times), to found a new settlement, to ration the grain (2 times), to lift the rationing (2 times) and to send settlers out. Llathlon became his enemy. He lived under the rule of Tuelsue. He saw Llaness and Stianess founded. He knew hunger in Llaness. When he died, House Giasrial counted 4 other members. He died of hunger in the summer of year 40, at the age of 39. Lainchon succeeded him.