'Father in law' in the Bible

Now, his daughter-in-law, wife of Phinehas, was with child, ready to give birth, and, when she heard the tidings, as to the taking of the ark of God, and the death of her father-in-law, and her husband, she bowed herself and gave birth, for her pains had seized her.

And she called the boy I-chabod! saying, Exiled is the glory from Israel, - In regard to the taking of the ark of God, and to her father-in-law, and to her husband.