Abraham was from Ur, his father's name was Terah, he was married to Sarai, and he had two sons named Ishmael and Isaac. Abraham's name was originally Abram, but God changed it to Abraham, which means "father of multitudes." God promised Abraham that he would be the father of a great nation.
The story of Abraham appears in Genesis 11 through 25. Abraham lived approximately 2,000 years before the birth of Christ.
Genesis 12 describes God's call to Abram. God promised to make Abram the father of a great nation when Abram was already 70 years old. Chapter 15 explains that God did not choose Abram because of any great act on Abram's part. God gives Abram a vision of his covenant with him in this chapter, and changes his name to Abraham.
God promises Abraham and Sarai a child named Isaac in chapter 17, and he changes Sarai's name to Sarah. After Isaac's birth, God requires Abraham to sacrifice Isaac to him in Chapter 22. Abraham intends to sacrifice his son, but an angel stops him, and God provides a sacrifice in Isaac's place. God gave Abraham other offspring and a prosperous life in exchange for his willingness to sacrifice his son and his obedience. Abraham lived to 175 years old.