my @names = split/^/, do 'unicore/Name.pl';

#...

my @vowelsets;
for my $v ( qw/A E I O U/ ) {
    push( @vowelsets, 
          join( '', map { chr hex( substr $_, 0, 4 ) }
                grep /LATIN (?:SMALL|CAPITAL) LETTER $v/, @names ));
}

# now you can use each element of @vowelsets as a character class
# (similiarly for consonants...)