The way we originally got the names to Sonic's bandmates was from a little-known Japanese website called Sonic Dimensions. It doesn't exist anymore, but at the time it was one of the very few Sonic websites made by a fan from Japan. Heck, it probably still is, even though it hasn't been online in ages. Sharps, Mach and Max come from the site's list of characters in the series.
If you go to any of their profiles, there isn't much in there aside from explaining that they were meant to be in the sound test. Now, I know the question that would immediately be asked is how do we know these names are real and not just made up by the guy who wrote the site. Ignoring the fact that the rest of the site doesn't seem to be one to use fan conjecture, each profile for these three characters (through the use of Google Translate) mentioned "Beep! Megadrive" as the magazine he learned of their existence. Yes, the same publication where we not that long ago found screenshots of the earliest playable build of Sonic the Hedgehog. Not the same issue, of course, but still. So what it looks is that, at some point, the magazine used the name of those characters, assumingly in coverage of the development of the game, unless their review happened to speak of a sound test that was no longer part of the final product.
http://web.archive.o...rof/sharps.html - link to Sharp's profile, for those curious.
There, that should settle that one.
As for Madeline...I mean, Yuji Naka has already gone on record with stories that completely contradict her concerning Madonna and Sonic's Band and why they weren't in the game. I sincerely doubt some random American woman was the one who came up with the idea for Sonic, especially since Sega of America was so against the idea of a game staring a hedgehog in the first place.


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