δώσων
From LSJ
ὁμοῦ ἦν καὶ ἔχειν τὴν πόλιν καὶ τὸ γένος ὅλον μετὰ τῆς πόλεως → it was much the same thing to have the city and to have the whole race together with the city
English (LSJ)
οντος, ὁ, fut. part. of δίδωμι,
A always going to give, always promising: hence Δώσων as a name of Antigonus II, Plu.Cor.11.