Overview
Ptolemy IX Soter II (, Ptolemaĩos Sōtḗr "Ptolemy the Saviour"), commonly nicknamed Lathyros (Λάθυρος, Láthuros "chickpea"), was twice King of Ptolemaic Egypt. He was the son of Ptolemy VIII and Cleopatra III. He reigned as Ptolemy Philometor Soter in joint rule with his grandmother Cleopatra II and mother Cleopatra III from 116 to 107 BC, and then again as Ptolemy Soter from 88 to 81 BC.
Ptolemy IX became the heir apparent after the murder of his half-brother Ptolemy Memphites in 130 BC, during a civil war between Ptolemy VIII and Cleopatra II. On his father's death in 116 BC, he became co-regent with Cleopatra II (until 115 BC) and with Cleopatra III. He eventually quarrelled with his mother and in 107 BC, she deposed him and replaced him with his younger brother, Ptolemy X. However, Ptolemy IX succeeded in seizing control of Cyprus. From there he invaded Judaea, but was prevented by Ptolemy X from invading Egypt (103–102 BC). In 88 BC, the Alexandrians expelled Ptolemy X and restored Ptolemy IX to the throne. He reigned alone until 81 BC, when he appointed his daughter Berenice III as co-regent shortly before his own death. She succeeded him as ruler.
Background and early life
When the Ptolemaic king Ptolemy V died in 180 BC, he left three children: Ptolemy VI, Cleopatra II, and Ptolemy VIII. All three ruled together from 169 BC until 164 BC, when Ptolemy VIII expelled his brother from power. In 163 BC, he was expelled in turn and forced to withdraw to Cyrene. However, when Ptolemy VI died in 145 BC, Ptolemy VIII was invited back to Egypt to serve as king, marrying his sister Cleopatra II, also sister and widow of Ptolemy VI. The relationship between Ptolemy VIII and Cleopatra II rapidly deteriorated, especially when Ptolemy VIII took Cleopatra III, daughter of Ptolemy VI and Cleopatra II, as a second wife. The conflict eventually led to a civil war with Cleopatra II on one side and Ptolemy VIII and Cleopatra III on the other (132-126 BC). Ptolemy VIII and Cleopatra III were victorious, but reconciled with Cleopatra II and restored her as co-regent in 124 BC.
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