matronymic
/ˌmatrəˈnɪmɪk
/(also metronymic /ˌmɛtrəˈnɪmɪk/)
noun
A name derived from the name of a mother or female ancestor.It is interesting that their usual surnames are all patronymics or matronymics, rather than the locatives that would be more likely were any of the four from immigrant families.
adjective
Denoting or relating to a name derived from the name of a mother or female ancestor.
Origin
Late 18th century: from Latin mater, matr- 'mother', on the pattern of patronymic.