Antipater I of Macedon

Antipater II (d.279 BC) was the son of Cassander. He was king of Macedon from 297 BC until 294 BC, jointly with his brother Alexander V. Eventually, he ousted his brother from the throne. Alexander turned to Demetrius Poliorcetes for help, and Demetrius overthrew Antipater and then had Alexander murdered. Antipater himself survived, however, and in 279 BC he became king again after the death of Ptolemy Keraunos. His new reign lasted only few months before he was killed by his cousin Sosthenes.