1. (a.) Derived from one's father's name; named after one's Father\.

2. (n.) A modification of the father's name borne by the son; a name derived from that of a parent or ancestor; as, Pelides, the son of Peleus; Johnson, the son of John; Macdonald, the son of Donald; Paulowitz, the son of Paul; also, the surname of a family; the family name.

affectionate name agnomen appellation appellative binomen binomial name byname byword cryptonym denomination designation diminutive empty title epithet eponym euonym family name handle honorific hypocoristic hyponym label last name maiden name married name matronymic moniker name namesake nickname nomen nomen nudum patronymic pet name praenomen proper name proper noun scientific name secret name sobriquet style surname tag tautonym title trinomen trinomial name