Ptolemy X. was the son of Cleopatra III. and Ptolemy VIII. and ruled in Egypt as a Pharaoh in 107 - 88 BC.
Ptolemy IX. was an elder brother of Ptolemy X. After Ptolemy’s VIII. death Ptolemy IX. came to the Egyptian throne, even if Cleopatra III. supported Ptolemy X., who had to settle for reigning over Cyprus. It wasn’t easy at all and had to strive for the reign many years and resist the plots of his siblings, even if he got Cyprus in testament.
Ptolemy X. came to the Egyptian throne because of intrigues of his mother Cleopatra III. in 107 BC. He forced his elder brother to Cyprus and came to the throne himself. He traditionally ruled with his wife-cousin Berenice III.
Ptolemy X. Alexander I.