Similar things happen in unincorporated areas. I live out in the country, and I remember a year or two ago, a place-name appeared on Google Maps calling the area "Mary's Grove," which makes some kind of sense to me as a local, even though I've never heard anyone refer to the area as that, but it disappeared as mysteriously as it appeared after a while.

Now it says I live in "Warlick," and I have no clue where that name came from.