Berenice I of Egypt in Harpers Dictionary of Classical Antiq

The granddaughter of Cassander, brother of Antipater. She married Philip, a Macedonian, probably one of the officers of Alexander, and became by him the mother of many children, among whom were Magas, king of Cyrené, and Antigoné, whom she married to Pyrrhus, king of Epirus. She followed into Egypt Eurydicé, daughter of Antipater, who returned to that country to rejoin her husband, Ptolemy I. Berenicé inspired this prince with so strong a passion that he put away Eurydicé, although he had children by her, and married the former. He also gave the preference, in the succession to the throne, to her son Ptolemy, notwithstanding the better claims of his offspring by Eurydicé. Berenicé was remarkable for her beauty, and her portrait often appears on the medals of Ptolemy I. along with that of the latter.