Google Inc., for whom Google Search was named, should know something about this topic.
There are certain brand names that are so famous that people are more aware of them than the technical names of the products themselves.
For instance, teachers and office workers who need to make duplicates of printed documents are likely to make “Xerox copies” (named after Xerox Corporation Ltd., one of the first companies to make photocopying machines) instead of “photocopies” (the generic name). Similarly, people who have to blow their noses are likely to grab a box of “Kleenex” instead of “facial tissues.”
Speaking of -nym words, “Batman” is an “aptronym" (a name that suits its owner) and a "pseudonym" (a fake name, in his case, of Bruce Wayne).
Batman the hero is also “anonymous" (in the sense that people don’t know his true identity) and "synonymous" with "crime fighter" or "vigilante."