Berenice II (267 or 266 BC--221 BC) was a ruling queen of Cyrene by birth, and a queen and co-regent of Egypt by marriage to her cousin Ptolemy III Euergetes, the third ruler of the Ptolemaic dynasty of Egypt.
Berenice II (267 or 266 BC--221 BC) was a ruling queen of Cyrene by birth, and a queen and co-regent of Egypt by marriage. She was the daughter of Magas of Cyrene and Queen Apama II, and the wife of Ptolemy III Euergetes, the third ruler of the Ptolemaic dynasty of Egypt.