Abimelek

Facts:

Abimelek was a Philistine king over the region of Gerar during the time when Abraham and Isaac were living in the land of Canaan.

Abraham deceived King Abimelek by telling him that Sarah was his sister rather than his wife.
Abraham and Abimelek made an agreement regarding ownership of wells at Beersheba.
Many years later, Isaac also deceived Abimelek and the other men of Gerar by saying that Rebekah was his sister, not his wife.
King Abimelek rebuked Abraham, and later Isaac, for lying to him.
Another man by the name of Abimelek was a son of Gideon and a brother of Jotham. Some translations may use a slightly different spelling of his name to make it clear that he is a different person from King Abimelek.