Two necropolis sealings, found in 1985 and 1991 in Abydos, in or near the tombs of Den and Qa'a, show Narmer as the founder of the First Dynasty, followed by Hor-Aha.
Archaeological evidence suggests that Egypt was at least partially unified during the reigns of Ka and Iry-Hor (Narmer's immediate predecessors), and perhaps as early as Scorpion I (several generations before Iry-Hor).