Pronunciation: (pa"tru-nim'ik), [key]
1. (of family names) derived from the name of a father or ancestor, esp. by the addition of a suffix or prefix indicating descent.
2. (of a suffix or prefix) indicating descent.
1. a patronymic name, as Williamson (son of William) or Macdonald (son of Donald).
2. a family name; surname.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.