Gilhaelith, sometimes referred to as the tetrarch, was a master geomancer and mathemancer, who dwelt atop Booreah Ngurle, in his geomantic fortress of Nyriandiol for many years. He was the illegitamite son of Rulken, making him the grandson of Maigraith and Rulke, as well as a triune. Gilhaelith gave himself the title of tetrarch, to mock his grandmothers failure, in not being able to succeed in creating a person with the blood of all four species; a tetrarch.