deonym
A term which derives from a proper name (proper noun), such as brand name (genericized trademark), a given name or surname (eponym), or a place name (toponym).
[…] increased occurrence of deonyms. Among them, nearly half come from trade names (company names, brand names or product names). This chapter aims to study deonyms deriving from trade names.
Where it comes from
From de- + -onym (“name”). Compare Italian deonomastica (“words of a language that are derived from given names, last names, ethnonyms, and toponyms”), from de- + onomastica.
Adapted from the Wiktionary entry deonym (CC BY-SA 4.0).