I think we need to travel to France and Belgium immediately and get these questions answered once and for all !
It's a reference to the cut. If anything they should be named for some native american group because potatoes were imported to Europe...they aren't native.
Because the Belgians are also known as Flemmish.. You want Flem Fries with that? I thought not. :)
Why don't you just call them ******* CHIPS !