Wordnet 3.0
NOUN (1)
1.
a family name derived from name of your father or a paternal ancestor (especially with an affix (such as -son in English or O'- in Irish) added to the name of your father or a paternal ancestor);
[syn: patronymic, patronym]
WordNet (r) 3.0 (2006):
patronym
n 1: a family name derived from name of your father or a
paternal ancestor (especially with an affix (such as -son
in English or O'- in Irish) added to the name of your
father or a paternal ancestor) [syn: patronymic,
patronym]