Born: 305 BCE, Turkey (possibly)
Died: Unknown (200s BCE)
Country most active: Egypt
Also known as: Ἀρσινόη
The following is excerpted from A Cyclopædia of Female Biography, published 1857 by Groomsbridge and Sons and edited by Henry Gardiner Adams.
A daughter of Lysimachus, king of Thrace, was the first wife of Ptolemy Philadelphus, king of Egypt, by whom she had three children, Ptolemy, Lysimachus, and Berenice. Suspecting her of plotting against his life, Ptolemy banished her, and she fled to Cyrene, where she was kindly received by Magas, half-brother of the king of Egypt. Magas married her, and adopted her daughter Berenice. Berenice was betrothed to Demetrius, son of Demetrius Polioreetes, who came from Macedonia to marry her; but instead, transferred his affections to Arsinoe, which led to his assassination, and the marriage of Berenice to Ptolemy the Third, who was probably her brother, by which the kingdoms of Egypt and Cyrene were again united. The history of this princess is very confused; and there is much difference of opinion on the subject.