metronymic /met-rə-nimˈik/ or matronymic /mat-/

1. Derived from the name of one's mother or other female ancestor
2. Indicating the mother
3. Using such a system of naming

A name so derived (cf patronymic)

• unsparingness
• unsparingnesses
• unsparred
• unsparring
• unspars
• unspeak
• unspeakable
• unspeakableness
• unspeakablenesses
• unspeakably
• unspeaking
• unspeaks
• unspecialised
• unspecialized
• unspecific
• unspecified
• unspectacled
• unspectacular
• unspeculative
• unsped
• unspell
• unspelled
• unspelling
• unspells
• unspent