'Son in law' in the Bible

The Philistines asked, "Who did this?" They were told, "Samson, the Timnite's son-in-law, because the Timnite took Samson's bride and gave her to his best man." So the Philistines went up and burned her and her father.

On the fourth day they woke up early and the Levite got ready to leave. But the girl's father said to his son-in-law, "Have a bite to eat for some energy, then you can go."