Another king (basileus heteros). A different kind of king also, probably a king of the new dynasty after the shepherd kings had been expelled from Egypt.
Who knew not Joseph (hos ouk ēidei ton Iōsēph). Second past perfect of oida used like an imperfect. Joseph’s history and services meant nothing to the new king. “The previous dynasty had been that of the Hyksos: the new king was Ahmes who drove out the Hyksos” (Knobel).