'Son in law' in the Bible

For many in Judah were bound by oath to him because he was the son-in-law of Shecaniah son of Arah. His son Jehohanan took as a wife the daughter of Meshullam son of Berekiah.

One from the sons of Jehoiada, son of the high priest Eliashib, [who was] the son-in-law of Sanballat the Horonote [was there]. I chased him away from me.