Fuinur (S."Dark fire"), known as Stormheart, was the eldest son of Edhelion, the first Prince of Belfalas (S.A. 3400-T.A. 96). Fuinur did not succeed Edhelion as prince; instead, together with his younger brother Herumor, he rebelled against his father by defecting to Umbar, claiming his own lordship in lieu of submission to the authority of Elendil's sons in Gondor. Although Fuinur extended his power southwards over the Haradrim, he was nevertheless deemed a significant threat to Gondor, because in his rebellion he stole the Karma of Aldarion, the heirloom of Imrazor's line, and it was feared that Edhelion's son might draw upon the veneration of this artifact as a means of swaying those Dúnedain of the Pelargirean League dissatisfied with the royal claims of Elendil and his sons to ally t