"patronymic" in the noun sense
1. patronymic, patronym
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)
"patronymic" in the adjective sense
1. patronymic
of or derived from a personal or family name
Source: WordNet® (An amazing lexical database of English)
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