Maybe one of the Name4's has trailing spaces? 
while ($line = <FILENAME>) {
   $line =~ s/\s+$//;  # Remove trailing spaces and newline.
   $uniquelines{$line} = 1;
}

foreach $k (keys %uniquelines) {
   print NEWFILE "$k\n";
}

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In reply to Re: removing duplicate lines by ikegami
in thread removing duplicate lines by Anonymous Monk

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