metronymic Meaning, Definition & Usage

  1. noun a name derived from the name of your mother or a maternal ancestor
    matronymic.

WordNet

Met`ro*nym"ic adjective
Etymology
Gr. mother + , for name.
Definitions
  1. Derived from the name of one's mother, or other female ancestor; as, a metronymic name or appellation. -- A metronymic appellation.

Webster 1913