Sidenote: Its funny that everybody calls the Dutch "Dutch" (when
speaking English), which pretty much is the word "deutsch", which, guess
what, means "German" (cf. Pennsylvania Dutch). That has always baffled
me --- do Dutch people refer to themselves as "Dutch" when speaking
dutch? The term for "Dutch" is "Nederlands" or "Hollands", isn't it?
It is fairly common that people are referred to by others by a different
name than what they call themselves in their native language. Germans
call themselves Deutsch, Chinese call themselves Zhong-guo-ren (I
think), Iroquois call themselves Haudenosaunee, and so on.
The reason for this, I'm guessing, is that visitors and/or invaders
either didn't bother to ask what the people call themselves, or they
misunderstood the answer, or they can't pronounce the answer, or they
didn't ask an authoritative source, or a combination of the above. (For
example, if you ask my neighbor what my name is, he might say "The guy
that doesn't mow his lawn often enough.")
Anyway, I believe this thread has gone on far enough off-topic...