Alexander

Alexander (; flourished 3rd century BC) was a Greek nobleman of Anatolia and served as a Seleucid official.

Alexander was the first son born to Achaeus by an unnamed Greek mother. His father Achaeus was a wealthy nobleman who owned estates in Anatolia. His family had power in Anatolia with strong royal connections. Alexander had three siblings, two sisters, Antiochis and Laodice I, and a brother Andromachus. His father Achaeus was the second son of King Seleucus I Nicator and his first wife Apama I.

According to surviving inscriptions, Alexander was already active and held high positions under his paternal uncle Antiochus I Soter. The surviving decree at Bargylia dates from 270–261 BC. In the civil war between Seleucus II Callinicus and his brother Antiochus Hierax, Alexander supported this second nephew, and held Sardis against attacks by Seleucus II.

After the end of the civil war, nothing is known on Alexander. His namesake was his great-nephew Seleucus III Ceraunus, whose name was Alexander until he succeeded his father Seleucus II Callinicus as King in 225 BC.