'Sons in law' in the Bible

Then the two visitors said to Lot, "Who else do you have here? Do you have any sons-in-law, sons, daughters, or other relatives in the city? Get them out of this place

Lot then went out and told his sons-in-law (they had married his daughters), "Get out of here! The LORD is going to destroy this city!" But his sons-in-law thought he was joking.