matronymic
matronym

Matronymic: A surname based on the given name of the mother.

If the father's name is unknown, a matronymic is used.

If you really can't bring yourself to just call me Keishi," she said, "I could make up a matronymic.

A component of a name based on the name of one's mother or a female ancestor is a matronymic.

It may be a matronymic derived from Toska, a diminutive of Teodosija and Teodora.

The name Anjaneya is a matronymic for Hanuman whose mother's name is Anjani.

As an English surname, Dorrit may be a variant of the surname Durward, or a matronymic derived from the given name Dorothy.

An example of an Arabic matronymic is the name of Jesus in the Qur'an, 'Īsá ibn Maryam, which means Jesus the son of Mary.

The rebellious officers shortly installed as the country's leader General Maximiliano Hernández Martínez (known in El Salvador by his matronymic, Martínez), who had been Araujo's vice president and minister of war.

The family name in the Dominican Republic is Rojas, but Felipe Alou and his brothers became known by the name Alou when the Giants' scout who signed Felipe mistakenly thought his matronymic was his father's name.