matronymic

from WordNet (r) 3.0 (2006)
matronymic
    n 1: a name derived from the name of your mother or a maternal
         ancestor [syn: {matronymic}, {metronymic}]
from The Collaborative International Dictionary of English v.0.48
Matronymic \Mat`ro*nym"ic\, n. [L. mater mother + -nymic, as in
   patronimic.]
   See {Metronymic}.
   [1913 Webster]
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