Titus Livius (Livy), The History of Rome, Book 35
Cyrus Evans, Ed.

47. When an account of this conference was brought to the king, at the ships where lie had staid, he resolved for the present to return to Demetrias; for he had not come to them with a sufficient number of men to attempt any thing by force. [2] At Demetrias he held another consultation with the Aetolians, to determine what was next to be done, as their first effort had proved fruitless. [3] It was agreed that they should make trial of the Bœotians, Achaeans, and Amynander, king of the Athamanians. The Bœotian nation they believed to have [p. 1602]been disaffected to the Romans, ever since the death of Brachyllas, and the consequences which followed it. [4] Philopœmen, chief of the Achaeans, they supposed to hate, and be hated by, Quinctius, in consequence of a rivalship for fame in the war of Laconia. [5] Amynander had married Apama, daughter of a Megalopolitan, called Alexander, who, pretending to be descended from Alexander the Great, had given the names of Philip and Alexander to his two sons, and that of Apama to his daughter; [6] and when she was raised to distinction, by her marriage to the king, Philip, the elder of her brothers had followed her into Athamania. [7] This man, who happened to be naturally vain, the Aetolians and Antiochus persuaded to hope (as he was really of the royal family) for the sovereignty of Macedonia, on condition of his prevailing on Amynander and the Athamanians to join Antiochus; [8] and these empty promises produced the intended effect, not only on Philip but likewise on Amynander.