Abimelech (Judge living before Israel's Monarchy)

Several men named Abimelech appear in Genesis, most notably a Philistine king of Gerar who took Sarah into his household believing she was only Abraham's sister, then returned her once God warned him in a dream, and a similar episode later played out between Abimelech and Isaac over Rebekah. A different Abimelech, Gideon's son by a concubine, murdered nearly all seventy of his brothers to make himself king over Shechem, and he died ignobly when a woman dropped a millstone on his head during a siege and he had his armor-bearer finish him off rather than be known as killed by a woman.