The more I think about this, the more I think I may not name them at all (I call the shape the ROCit, after my band) and just keep track of them via consecutive serial numbers and not worry about it. It's getting complicated!
In that regard why not just give them a number? DB2, DB4 .... Skip a few numbers along the way and 25 years from now there'll be someone on going batshit trying to find the missing model
The DocBass ROCit is pretty cool