You can't really safely apply a set of capitalization rules to a person's name. You pretty much have to take it as they write it. And when you lose that information, you can't re-generate it. How to capitalize author names describes that de, d', van, and von may not be capitalized. So James Van Den Berghe could be spelled as I have done, or it could be James van den Berghe, or there could be some other magic combination. And some names defy all conventions.

For your problem statement I would do this:

#!/usr/bin/env perl

use strict;
use warnings;

my @names = (
    'VAN DEN BERGHE',
    'OSWALD',
    'ANDERSON',
    'LLOYD-WRIGHT',
);

foreach my $name (@names) {
    my $altered = join('', map {ucfirst(lc($_))} split /(\s+|-)/, $nam
+e);
    print "$name => $altered\n";
}
[download]

which produces:

VAN DEN BERGHE => Van Den Berghe
OSWALD => Oswald
ANDERSON => Anderson
LLOYD-WRIGHT => Lloyd-Wright
[download]

But that doesn't make any attempt at dealing with the nuances discussed above.