Genesis 16:15

16:15 So Hagar gave birth to Abram’s son, whom Abram named Ishmael.

Genesis 38:4

38:4 She became pregnant again and had another son, whom she named Onan.

tn Heb “and Abram called the name of his son whom Hagar bore, Ishmael.”

sn Whom Abram named Ishmael. Hagar must have informed Abram of what the angel had told her. See the note on the name “Ishmael” in 16:11.