'Son in law' in the Bible

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.”