Definitions for "Patronymic"
Derived from ancestors; as, a patronymic denomination.
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.
(medieval) a surname based on the father's name; i.e., Williamson or Fitz William See also toponym