Ptolemy IV Philopator
Ptolemy III died in late 222 BC and was succeeded by his son by Berenice, Ptolemy IV Philopator. Berenice died soon after, in early 221 BC. Polybius states that she was poisoned, as part of a general purge of the royal family by the new king's regent Sosibius. She continued to be venerated in the state ruler cult. By 211 BC, she had her own priestess, the athlophorus ('prize-bearer'), who marched in processions in Alexandria behind the priest of Alexander the Great and the Ptolemies, and the canephorus of the deified Arsinoe II.