'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).

When the territory of the Danites slipped out of their control, they went up and fought against Leshem, captured it, and struck it down with the sword. So they took possession of it, lived there, and renamed Leshem after 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.