If you're asking why God is referred to as the God of Abraham, Isaac, and Jacob, it is because they are the Patriarchal leaders in Jewish, and therefore Christian history.
If that not what you're asking for then can you rephrase the question? it doesn't make sense.
Abraham, Moses, Joseph, Solomon, David, Jonah, Peter, Paul, Timothy and many many more
Jesus (MAn and God), Elijah, Moses, Abraham, and King David (in my opinion)
Abraham made a covenant with God; and God swore also to Isaac and Jacob that He would uphold the covenant of Abraham with them too. For Joseph, no such statement or covenant was made. The earlier covenant applied to Joseph and all of his brothers equally and was not reiterated until the time of Moses.See also the Related Links.Link: The covenantLink: Abraham, Isaac and Jacob
Some important people were: Abraham, Joseph, Moses, and David.
Interestingly, God never revealed Himself to Joseph, even though he was God's instrument in Egypt. Note that HE is called the God of Abraham, Isaac, and Jacob. Also note in Exodus that God identifies HIMSELF as YHVH, a Name HE had not used before....as HE also said. While it is apparent that Joseph believed in God and acted on dream interpretation, Joseph did not have a name for God except the one he had been taught...The God of Abraham, Isaac, and Jacob. Since Jacob was his dad, it would have been simply the household worship of this God that daddy had identified. So since Joseph did not have personal interaction with God as his father and grandfather and greatgrandfather did, God is not identified as Joseph's God.
Abraham was the great-grandfather of Joseph. Abraham to Isaac to Jacob to Joseph.
Joseph was the father of Jesus Christ, and is now a saint. Abraham was very old, and married to his wife Sarah. They wanted a child very bad, and when they prayed to God they were blessed, and they had a little boy. God promised Abraham that he would have many, many descendants. One of his descendants had 12 boys!
Abraham-Joseph Bénard died in 1822.
Abraham-Joseph Bénard was born in 1750.
Joseph Abraham was born on 1981-09-11.
Joseph Abraham Steblicki was born in 1726.
Joseph Abraham Steblicki died in 1807.