patronymic
adj//ˌpætɹəˈnɪmɪk//patronym, patronymisk, patronymikon, fadersnamn
Derived from one's father.
(by extension) Derived from one's ancestors.
(onomastics, by extension) A name acquired from the first name of one's father, grandfather or earlier (male) ancestor. Some cultures use a patronymic where other cultures use a surname or family name; other cultures (like Russia) use both a patronymic and a surname.