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.

(Geneva Bible) - Yet in very deed she is my (m) sister, for she is the daughter of my father, but not the daughter of my mother, and she is my wife;
(m) By sister, he meaneth his cousin germane, and by daughter, Abraham's niece, Genesis 11:29; for
so the Hebrews use these words.