He was the first to teach the belief in one God.
Abraham!
Abraham
As far as we know Abraham did not have siblings that we know of.
Abraham was the christians father in faith and a person honored by the Muslims
Abraham is considered the father of Christians because he is a foundational figure in the Judeo-Christian tradition, recognized for his faith and covenant with God. In Christianity, he is viewed as a model of faith and righteousness, and his belief in God's promises is seen as a precursor to the faith that Christians are called to embody. Additionally, the New Testament often references Abraham to illustrate themes of faith and justification, establishing a spiritual lineage that connects Christians to the patriarch.
because he believed in god and did what he asked
Judaism, Christianity, and Islam.
God called Abraham righteous because of his faith and obedience. Abraham trusted in God's promises, demonstrated by his willingness to leave his homeland and obey God's commands, such as when he was prepared to sacrifice his son Isaac. This faith and obedience showed Abraham's righteousness before God.
Abraham
Abraham is considered as thefather of Israel nation, and also the Islamic nation. So he is called father Abraham.
Abraham
Abraham is called father of their nations.