Alexander I of Epirus

Alexander I of Epirus (Ancient Greek: Ἀλέξανδρος Α'; c. 370 BC – 331 BC), also known as Alexander the Molossian (Ἀλέξανδρος ὁ Μολοσσός), was a king of Epirus (343/2–331 BC) of the Aeacid dynasty. As the son of Neoptolemus I and brother of Olympias, Alexander I was an uncle and brother-in-law of Alexander the Great. The father of Pyrrhus of Epirus, Aeacides, was also his first cousin.

Source: Wikipedia — https://en.wikipedia.org/wiki/Alexander_I_of_Epirus