Cassander (354‒297 B.C.)

Cassander, king of Macedonia, passed over in the succession by his father Antipater; allied himself with the Greek cities; invaded Macedonia and ascended the throne; married Thessalonica, the sister of Alexander the Great, but put Alexander's mother to death, thus securing himself against all rival claimants; left his son Philip as successor (354‒297 B.C.).

Definition taken from The Nuttall Encyclopædia, edited by the Reverend James Wood (1907)