'Sister' in the Bible

He had conferred with Joab the son of Zeruiah [David’s half sister] and with Abiathar the priest; and they followed Adonijah and helped him.

And Hadad found great favour in the sight of Pharaoh, so that he gave him to wife the sister of his own wife, the sister of Tahpenes the queen.

And the sister of Tahpenes bare him Genubath his son, whom Tahpenes weaned in Pharaoh's house: and Genubath was in Pharaoh's household among the sons of Pharaoh.