His mother was Arsinoe of Macedon, and, while his father is unknown, ancient sources variously describe him either as the son of Lagus, a Macedonian nobleman, or as an illegitimate son of Philip II of Macedon (which, if true, would have made Ptolemy the half-brother of Alexander), but it is possible that this is a later myth fabricated to glorify the Ptolemaic dynasty. Ptolemy was one of Alexander's most trusted generals, and was among the seven somatophylakes (bodyguards) attached to his person. He was a few years older than Alexander, and had been his intimate friend since childhood.
He was succeeded by his son Ptolemy II Philadelphus.
Ptolemy I in Hellenic TradersEdit
In 312 BC, Ptolemaios was locked in a struggle with Antigonos. Antigonos commissioned the polis of Rhodes to build ships for his fleet. Two years later, Sostratos suggested that, as Rhodes had economic ties to Egypt, supplying Antigonos had been a bad idea. His cousin, Menedemos, retorted that Rhodes had no interest in getting on Antigonos' bad side.
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