It's interesting to consider how many details on our online maps might be there because of submissions from random people who may or may not be submitting official names or details. When you zoom in to see these minute details, there's no way that Google or Apple can fact check every suggested change, so they have to assume that most submissions are truthful in order to hopefully provide details down to the most local zoom level.
The parking lot and back driveway of the metal shop next door is on Google as a street, with a name - 50th Street. And nobody knows why. I've deleted it from Waze ages ago, but Google has yet to catch up, if they even pull map data from Waze.
There has been a huge debate in Detroit over Google maps. Entire neighborhoods have either been renamed or created. Great example, 'the eye' which never existed before Google maps. Now businesses looking to take advantage have renamed themselves with eye in the name so I guess it's going to stick.
When MapMaker was still around, you could see a lot, but not all, of the history of a feature on Google Maps. A submission from an end user would have been visible clearly as such. Imports from third parties would have been less obvious (and definitely wouldn't have named the source).
