15And Hagar bore Abram a son,and Abram called the name of his son, whom Hagar bore, Ishmael.
Abram must have had a full account of the encounter Hagar had with the angel of the Lord. Abram believed Hagar. And he is taking his responsibility as the father of many nations.
15 And Hagar bore Abram a son, and Abram called the name of his son, whom Hagar bore, Ishmael.