Re: Rover = bicycle
Another example in English is "biro" (a type of pen) which was originally "Biro" because that was the name of the man who invented it.
"Hoover" is now uncapitalised and is just a "hoover".
Normal sticky tape is generally referred to as "sellotape", even though it is still the major brand name.
Apparently, "rollerblade" was originally a brand name so was capitalised but certainly isn't any more in BrE.
We don't use "xerox" (any more) in BrE. We just say "photocopy".
We also don't use "jello". It's "jelly" (which, confusingly, is used in AmE to describe what we call "jam".)
Remember - correct capitalisation, punctuation and spacing make posts much easier to read.