Ptolemy XIII Theos Philopator

Ptolemy XIII became Pharaoh of Egypt in 51 BC alongside his sister Cleopatra VII, inheriting a fractured throne as one of the last of the Ptolemaic dynasty. The co-rule collapsed: Cleopatra's exit from Egypt triggered civil war between the siblings. Ptolemy later shared power with another sister, Arsinoe IV, but the arrangement didn't hold. He drowned in the Nile on January 13, 47 BC, fifteen years old, his bid for sole control crushed in the wreckage of the dynasty's final years.