Wikipedia definition
1. Patriarchs (Bible)The Patriarchs of the Bible, when narrowly defined, are Abraham, the ancestor of all the Abrahamic nations; his son Isaac, the ancestor of the nations surrounding Israel/Judah; and Isaac's son Jacob, also named Israel, the ancestor of the Israelites. These three figures are referred to collectively as the patriarchs of Judaism, and the period in which they lived is known as the patriarchal age. They play significant roles in Hebrew Scripture during and following their lifetimes.
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