metronymy

metronym, metronymy, metronymic 1. Derived from the name of a mother or other female ancestor; especially, by the addition of a suffix or prefix which indicates descent. 2. Also applied to a people or state of society where such a system of naming prevails. 3. A name derived from that of a mother or maternal ancestor.
Found on http://www.wordinfo.info/words/index/info/view_unit/1305/

metronymy

system of naming after the mother's or female line
Found on http://phrontistery.info/m.html
No exact match found