Ptolemaic dynasty
The Ptolemaic dynasty (; Ancient Greek: Πτολεμαῖοι, Ptolemaioi), also known as the Lagid dynasty (Λαγίδαι, Lagidai; after Ptolemy I's father, Lagus), was a Macedonian Greek royal house which ruled the Ptolemaic Kingdom in Ancient Egypt during the Hellenistic period. Reigning for 275 years, the Ptolemaic was the longest and last dynasty of ancient Egypt from 305 BC until its incorporation into the Roman Republic in 30 BC. Ptolemy, a general and one of the somatophylakes (bodyguard companions) of Alexander the Great, was appointed satrap of Egypt after Alexander's death in 323 BC. In 305 BC he declared himself Pharaoh Ptolemy I, later known as Sōtēr "Saviour".