Ptolemy VIII. was a son of Cleopatra I and Ptolemy Epiphanes and brother of Ptolemy VI Philometor and Cleopatra II. He ruled in Egypt together with his siblings in 170 - 163 BC. By consensus with his brother, Ptolemy VIII remained the ruler of Cyrene (Cyrene - Kurene in Greek, city in northern Libya) since 163 BC and was supported by Rome in his attempts to take control of Cyprus.
After his brother's death Ptolemy VIII. married his sister Cleopatra II. and came to the Egyptian throne. They have a son Ptolemy Memphitis called after the place of his birth. Ptolemy VIII. married his cousin Cleopatra III. ceremonially in 142 BC. So two legitimate Queens occured, both of them wives of the rulers, which naturally caused a conflict in the royal family
Ptolemy VIII. was a merciless ruler. He ordered to kill his son Memphitis, let his body quarter and send to his mother. It caused a civil war and disintegration of the land. Ptolemy VIII. seized control over the whole land in 129 except Alexandria, which stayed loyal to Cleopatra. The city was conquered by Ptolemy VIII. in 126 and executed a set of repressions, which didn't make him more popular at all. Cleopatra came back from the banishment after the city conquest in 123 and began to rule again together with her brother-husband.
Ptolemy VIII, scornfully called Physcon (potbelly) by the inhabitants of Alexandria, died on 28th June, 116 BC in the 56th year of his reign. In his will he bequeathed Egypt to his cousin-wife Cleopatra III. and that of the sons, whom the mother establishes as a co-ruler. The second son was to rule independently on Cyprus.
Ptolemy VIII. Euergetes II.