Complex sentence: She was an Egyptian handmaid of Sarai (Sarah), whom she gave to Abram (Abraham) to bear his first son, Ishmael, the patriarch of the Ishmaelites.
Split into simpler sentences: She was an Egyptian handmaid of Sarai (Sarah), whom she gave to Abram (Abraham) to bear a child. Thus came the firstborn, Ishmael, the patriarch of the Ishmaelites.