ARSINOE I
(born c. 300 BC)
Daughter of King Lysimachus of Thrace and Nicaea. First wife of Ptolemy II and mother of Ptolemy III. She was exiled to Coptos in 279 BC on a charge of conspiracy after she was supplanted in the king’s affections by Arsinoe II.
Historical Dictionary Of Ancient Egypt by Morris L. Bierbrier