Genesis 16:15

15And Hagar bore Abram a son, and Abram called the name of his son, whom Hagar bore, Ishmael.

Genesis 21:2-3

2And Sarah aconceived and bore Abraham a son in his old age bat the time of which God had spoken to him. 3Abraham called the name of his son who was born to him, whom Sarah bore him, cIsaac.
 Isaac means he laughs
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