公公,翁,岳父
Father-in-law \Fa"ther-in-law`\, n.; pl. {Fathers-in-law}. The father of one's husband or wife; -- correlative to son-in-law and daughter-in-law. Note: A man who marries a woman having children already, is sometimes, though erroneously, called their father-in-law.
father-in-law n : the father of your spouse [also: {fathers-in-law} (pl)]