Who were the 4 patriarchs of the Old Testament?

The Judeo Christian Bible does not recognize four patriarchs, but three -- Abraham, Isaac, and Jacob.

Abraham was the man called away from his home country to wander as the Lord led him.

Isaac was the child of promise, and was born to Abraham when Abraham was 100 years old.

Esau and Jacob were twin brothers, with Jacob being the youngest. Esau was rash and sold his birthright to Jacob for a bowl of stew. Jacob (whose name meant Heel Grabber) was later renamed Israel (One Who Struggles with God) after confronting the Angel of the Lord the night before reuniting with his brother Esau.

Jacob had twelve sons -- Reuben, Asher, Naphtali, Joseph, Benjamine, Gad, Simeon, Levi, Judah, Zebulun, Issachar, and Dan. However, Jacob had believed Joseph to be dead and Levi was claimed by the Lord to be His priests, so these two sons were replaced by Joseph's sons Ephraim and Manasseh among the tribes who inherited land during the settlement in the book of Joshua.

So these thirteen tribes became the nation of Israel, though it is counted as twelve because Levi did not reveive territory in the Promised Land of Canaan.

One of the main passages for the Patriarchs is Exodus 3:15 "God also said to Moses, 'Say this to the Israelites: Yahweh, the god of your fathers, the God of Abraham, the God of Isaac, and the God of Jacob, has sent me to you. This is My name forever; this is how I am to be remembered in every generation.' " (HCSB)

These three were the fathers (patriarchs) of the twelve tribes of Israel.