Marhcara (Old Rh. "Horse-Care") was the High-Thegen (High-Chief) of the Ailgartas-Clan, and by no means “leader” of the Aivathiuda, which had always been a rather loose organization of tribes. His arch-enemy was the Easterling Lyhud (also High-Chief) of the Tros Clan of the Sagath tribe, Tros Hesnef.