The Ptolemaic dynasty, (Ancient Greek: Πτολεμαῖοι, sometimes also known as the Lagids or Lagides, Ancient Greek: Λαγίδαι, from the name of Ptolemy I's father, Lagus) was a Macedonian Greek royal family which ruled the Ptolemaic Empire in Egypt during the Hellenistic period. Their rule lasted for 275 years, from 305 BC to 30 BC. They were the last dynasty of ancient Egypt.
Ptolemy, one of the six somatophylakes (bodyguards) who served as Alexander the Great's generals and deputies, was appointed satrap of Egypt after Alexander's death in 323 BC. In 305 BC, he declared himself King Ptolemy I, later known as "Soter" (saviour). The Egyptians soon accepted the Ptolemies as the successors to the pharaohs of independent Egypt. Ptolemy's family ruled Egypt until the Roman conquest of 30 BC.
All the male rulers of the dynasty took the name Ptolemy. Ptolemaic queens, some of whom were the sisters of their husbands, were usually called Cleopatra, Arsinoe or Berenice. The most famous member of the line was the last queen, Cleopatra VII, known for her role in the Roman political battles between Julius Caesar and Pompey, and later between Octavian and Mark Antony. Her apparent suicide at the conquest by Rome marked the end of Ptolemaic rule in Egypt.
Read more about Ptolemaic Dynasty: Ptolemaic Rulers and Consorts, Simplified Ptolemaic Family Tree, Other Members of The Ptolemaic Dynasty, Medical Analysis