According to [
reprap.org]
Quote
The copyright covers the teardrop device, the neologism "RepRap" in upper, lower, or any mix of cases in any typeface, and the phrase "Fused Filament Fabrication" and its abbreviation to "FFF". The teardrop, "RepRap", "Fused Filament Fabrication" and "FFF" are also covered by the GPL. Anyone can use them freely in any way they choose, but they may not be registered as trademarks or restricted in any other way.
So you are ok with RepRap in the name providing you don't attempt prevent anyone else using the term, for example by applying to use it as a trademark.
Personally I prefer people not to use terms like reprap in company or website names, but Adrian seems to be relaxed about it.