Ptolemy IX Alexander I (Greek: Πτολεμαίος
Αλέξανδρος) was King of Egypt from 110 BC to 109 BC
and 107 BC till 88 BC.
He was the son of Ptolemy
VIII Physcon and Cleopatra III. In 110 BC he became
King with his mother as co-regent, after his mother
had deposed his brother Ptolemy IX Lathyros.
However, in 109 BC he was deposed by Ptolemy VIII.
In 107 BC he became King again, and again with his
mother as co-regent. In 101 BC he had his mother
killed, and ruled either alone or with his
niece/wife, Berenice III.
When he died, Ptolemy VIII regained the throne.
When Ptolemy VIII died, Ptolemy X's wife Berenice
III took over the throne for six months.