|Noah Webster's Dictionary|
(n.) Plural of Son-in-law.
Sons-in-law (2 Occurrences)
Genesis 19:12 The men said to Lot, "Do you have anybody else here? Sons-in-law, your sons, your daughters, and whoever you have in the city, bring them out of the place: (WEB BBE RSV NIV)
Genesis 19:14 Lot went out, and spoke to his sons-in-law, who were pledged to marry his daughters, and said, "Get up! Get out of this place, for Yahweh will destroy the city." But he seemed to his sons-in-law to be joking. (WEB JPS ASV BBE DBY WBS YLT NAS RSV NIV)