matronymic vs metronymic

matronymic and metronymic both are nouns.

Word	Noun	Adjective	Verb	Adverb
matronymic	Yes	No	No	No
metronymic	Yes	No	No	No

As nouns, matronymic and metronymic are synonyms defined as:

matronymic and metronymic: a name derived from the name of your mother or a maternal ancestor

matronymic (noun)	metronymic (noun)
a name derived from the name of your mother or a maternal ancestor	a name derived from the name of your mother or a maternal ancestor