Treasury of Scripture
Sarai.
Genesis 17:15 And God said to Abraham, As for Sarai your wife, you shall not call her name Sarai, but Sarah shall her name be.
Genesis 20:12 And yet indeed she is my sister; she is the daughter of my father, but not the daughter of my mother; and she became my wife.
Milcah.
Genesis 22:20 And it came to pass after these things, that it was told Abraham, saying, Behold, Milcah...
Genesis 24:15 And it came to pass, before he had done speaking, that, behold, Rebekah came out, who was born to Bethuel, son of Milcah...
Iscah. Iscah is called the daughter-in-law of Terah, (ver.
Genesis 11:31 And Terah took Abram his son, and Lot the son of Haran his son's son, and Sarai his daughter in law, his son Abram's wife...
,) as being Abram's wife; yet Abram afterwards said, she is the daughter of my father, but not the daughter of my mother. (ch.
Genesis 20:12 And yet indeed she is my sister; she is the daughter of my father, but not the daughter of my mother; and she became my wife.
.) Probably Haran was the eldest son of Terah, and Abram his youngest by another wife; and thus Sarai was the daughter, or grand-daughter of Terah, Abram's father, but not of his mother.