Kahvoerm Irithyl was the first Coronal of Cormanthyr, ruling from -4000 DR to his death in -2900 DR, having been the first elf clan leader to draw the Rulers' Blade. At the wish of the dying Coronal Oacenth of Jhyrennstar, and with the support of the nobles and the Council of Trees he united the realms of Semberholme, Jhyrennstar, and Elven Court into the empire of Cormanthyr.