<p><strong>Adjective:</strong></p><ul><li>derived from the name of a father or ancestor, especially by the addition of a suffix or prefix indicating descent</li><li>(of a suffix or prefix) indicating descent</li></ul><p><strong>Noun:</strong></p><ul><li>a patronymic name, as Williamson (son of William) or Macdonald (son of Donald)</li><li>a family name; surname</li></ul>