mother-in-law - anoppi
father-in-law - appi
son-in-law - vävy (the husband of one's child)
daughter-in-law (the wife of one's child) - miniä
brother-in-law (the brother of one's wife or husband) - puolison veli, sisaren mies, lanko
sister-in-law (the sister of one's wife or husband, the wife of one's brother or brother-in-law) - puolison sisar, veljen tai langon (sisaren miehen) sisar
(kyty - aviomiehen veli)
(nato - aviomiehen sisar)