Even though he was the brother of the king Mlkwqh Ryd and had an inscribed throne on which a typical royal action (s¹ḥdṯ) is recorded, there is no proof that ʿmwtr Ys¹rn actually ruled. The absence of the monogram and of the symbol "b" typical of the Nashshanite dynasty (present on the thrones Garbini-Francaviglia 1 and 2), together with the presence of the enigmatic word "lbw" (a title?), suggest to Garbini that ʿmwtr Ys¹rn could have been a co-regent of his brother.