9 letters · 16 points in Scrabble
adjective being or relating to or bearing the name of an eponym
originPIE word *h₁epi From Ancient Greek ἐπώνῠμος (epṓnŭmos, “concerning giving one’s name to something; named in a significant manner; surnamed”) + English -ous (suffix forming adjectives from nouns, denoting pertinence or relation).
Etymology from Wiktionary, CC BY-SA 3.0