I found these in a book a few years back called "all you ever wanted to know about advertising, but were too legal, decent and honest to ask"
Mostly European (and alleged, because I didn't have time to fully research the book)
Nova - (Vauxhall/GM) Had to be renamed in Spain - NO GO
Punto - Fiat - renamed in Mexico - colloq. for tiny manhood
until their respective renamings, I'd assume their similarly soundingness didn't help their sales quotas
They're proper nouns, and probably don't belong in this discussion, but I found them funny nonetheless ;-)
--Paul
cigless ...