Hâgâr — Hagar = “flight”

Yitschâq — Isaac = “he laughs”

tsâchaq — to laugh, mock, play

Genesis 17:17 — “Abraham threw himself on his face and laughed, as he said to himself, “Can a child be born to a man a hundred years old, or can Sarah bear a child at ninety?””

Genesis 17:19 — “God said, “Nevertheless, Sarah your wife shall bear you a son, and you shall name him Isaac; and I will maintain My covenant with him as an everlasting covenant for his offspring to come.”

Genesis 17:21 — “But My covenant I will maintain with Isaac, whom Sarah shall bear to you at this season next year.””

Genesis 21:3 — “Abraham gave his newborn son, whom Sarah had borne him, the name of Isaac.”

Genesis 21:4 — “And when his son Isaac was eight days old, Abraham circumcised him, as God had commanded him.”