'Ancestor' in the Bible

Now Joshua gave an allotment among the descendants of Judah to Jephunneh's son Caleb, just as God told Joshua, Kiriath-arba, which was named after the ancestor of Anak (that is, Hebron).

Later, when the descendants of Dan lost their territory, they went up and attacked Leshem. After they captured it and executed its inhabitants, they took possession of it and settled there, renaming the city of Leshem to Dan in memory of their ancestor Dan.

They gave them Kiriath-arba, also known as Hebron, (Arba was named after the ancestor of Anak), in the hill country of Judah, along with its surrounding pasture lands.

"Long ago your ancestors lived beyond the Euphrates River, including Terah, father of both Abraham and Nahor, where they served other gods. Then I took your ancestor Abraham from the other side of the Euphrates River and led him through the entire land of Canaan. I multiplied his descendants, and gave him his son Isaac.