Sarai.

Genesis 17:15
Then God said to Abraham, "As for Sarai your wife, do not call her Sarai, for her name is to be Sarah.

Genesis 20:12
Besides, she really is my sister, the daughter of my father--though not the daughter of my mother--and she became my wife.

Milcah.

Genesis 22:20
Some time later Abraham was told, "Milcah has also borne sons to your brother Nahor:

Genesis 24:15
Before he had finished praying, Rebekah came out with her jar on her shoulder. She was the daughter of Bethuel son of Milcah, the wife of Abraham's brother Nahor.

Iscah.

Genesis 11:31
And Terah took his son Abram, his grandson Lot son of Haran, and his daughter-in-law Sarai the wife of Abram, and they set out from Ur of the Chaldeans for the land of Canaan. But when they arrived in Haran, they settled there.

Genesis 20:12
Besides, she really is my sister, the daughter of my father--though not the daughter of my mother--and she became my wife.