Berenice II in the context of "Magas of Cyrene"

Ptolemy III Euergetes (Greek: Πτολεμαῖος Εὐεργέτης, romanized: Ptolemaîos Euergétēs, "Ptolemy the Benefactor"; c. 280 – November/December 222 BC) was the third pharaoh of the Ptolemaic dynasty in Egypt from 246 to 222 BC. The Ptolemaic Kingdom reached the height of its military and economic power during his kingship, as initiated by his father Ptolemy II Philadelphus.

Ptolemy III was the eldest son of Ptolemy II and Arsinoe I. When Ptolemy III was young, his mother was disgraced and he was removed from the succession. He was restored as heir to the throne in the late 250s BC and succeeded his father as king without issue in 246 BC. On his succession, Ptolemy III married Berenice II, reigning queen of Cyrenaica, thereby bringing her territory into the Ptolemaic realm. In the Third Syrian War (246–241 BC), Ptolemy III invaded the Seleucid empire and won a near total victory, but was forced to abandon the campaign as a result of an uprising in Egypt. In the aftermath of this rebellion, Ptolemy forged a closer bond with the Egyptian priestly elite, which was codified in the Canopus decree of 238 BC and set a trend for Ptolemaic power in Egypt for the rest of the dynasty. In the Aegean, Ptolemy III suffered a major setback when his fleet was defeated by the Antigonids at the Battle of Andros around 246 BC, but he continued to offer financial support to their opponents in mainland Greece for the rest of his reign. At his death, Ptolemy III was succeeded by his eldest son, Ptolemy IV.

Ptolemy IV Philopator (Greek: Πτολεμαῖος Φιλοπάτωρ, romanized: Ptolemaĩos Philopátōr; "Ptolemy, lover of his Father"; May/June 244 – July/August 204 BC) was the fourth pharaoh of Ptolemaic Egypt from 221 to 204 BC.

Ptolemy IV was the son of Ptolemy III and Berenice II. His succession to the throne was accompanied by a wide-ranging purge of the Ptolemaic royal family, which left control of the realm's government largely in the hands of his courtiers Sosibius and Agathocles. His reign was marked by the Fourth Syrian War (219–217 BC) with the Seleucid empire, which culminated in a decisive Ptolemaic victory at the Battle of Raphia, one of the largest battles of the whole Hellenistic Age. In the final years of his rule, control over the southern portion of the country was lost to the rebel pharaoh Hugronaphor. Ptolemy IV died in mysterious circumstances in 204 BC and was succeeded by his young son Ptolemy V Epiphanes under the regency of Sosibius and Agathocles.