'Son in law' in the Bible
Then the angels said to Lot, “Do you have anyone else here: a son-in-law, your sons and daughters, or anyone else in the city who belongs to you? Get them out of this place,
Then the Philistines asked, “Who did this?”They were told, “It was Samson, the Timnite’s son-in-law, because he has taken Samson’s wife and given her to another man.” So the Philistines went to her and her father and burned them to death.
On the fourth day, they got up early in the morning and prepared to go, but the girl’s father said to his son-in-law, “Have something to eat to keep up your strength and then you can go.”
Then David responded, “Who am I, and what is my family or my father’s clan in Israel that I should become the king’s son-in-law?”
“I’ll give her to him,” Saul thought. “She’ll be a trap for him, and the hand of the Philistines will be against him.” So Saul said to David a second time, “You can now be my son-in-law.”
Saul then ordered his servants, “Speak to David in private and tell him, ‘Look, the king is pleased with you, and all his servants love you. Therefore, you should become the king’s son-in-law.’”
Saul’s servants reported these words directly to David, but he replied, “Is it trivial in your sight to become the king’s son-in-law? I am a poor man who is common.”
When the servants reported these terms to David, he was pleased to become the king’s son-in-law. Before the wedding day arrived,
David and his men went out and killed 200 Philistines. He brought their foreskins and presented them as full payment to the king to become his son-in-law. Then Saul gave his daughter Michal to David as his wife.
Ahimelech replied to the king: “Who among all your servants is as faithful as David? He is the king’s son-in-law, captain of your bodyguard, and honored in your house.
He walked in the way of the house of Ahab and did what was evil in the Lord’s sight like the house of Ahab, for he was a son-in-law to Ahab’s family.
For many in Judah were bound by oath to him, since he was a son-in-law of Shecaniah son of Arah, and his son Jehohanan had married the daughter of Meshullam son of Berechiah.
Even one of the sons of Jehoiada, son of Eliashib the high priest, had become a son-in-law to Sanballat the Horonite. So I drove him away from me.