A New Macedonian Prince

One of the more intriguing figures of the first period of the Successors is Nicanor, the lieutenant and admiral of Cassander. He came into prominence when he assumed command of the Macedonian garrison at Athens, late in 319 B.c. After distinguishing himself there he took a fleet to the Bosporus, where with Antigonus' collaboration he won a decisive victory over Polyperchon's royal navy. Subsequently his aspirations became sufficiently lofty to threaten his patron's security, and Cassander took elaborate precautions to ensure his arrest and condemnation. Nicanor was clearly a figure of considerable importance; yet no source even hints at his origins and family background. Can conjecture go any way to filling the gaps?