.Ἄρδυος δὲ βασιλεύσαντος ἑνὸς δέοντα πεντήκοντα ἔτεα ἐξεδέξατο Σαδυάττης ὁ Ἄρδυος, καὶ ἐβασίλευσε ἔτεα δυώδεκα, Σαδυάττεω δὲ Ἀλυάττης
What declension is Σαδυάττης? It looks like a masculine first declension but could it be a third declension?
The context seems to require after Σαδυάττης ὁ Ἄρδυος, "And he ruled 12 years, and from-Saduattes Alyattes (succeded). Some for of dative seems most likely to provide that sense but I'm guessing.