my $AoH = [
            {
               'Lead'    => 'fred',
               'Wife'    => 'wilma',
               'Friend'  => 'barney',
               'Son'     => [
                              { 'name' => 'mike'},
                              { 'name' => 'jon' },
                              { 'name' => 'bill'}
                            ],
               'No'      => '1',
            },
            {
               'Lead'    => 'george',
               'Wife'    => 'jane',
               'Friend'  => 'sam',
               'Son'     => [
                              { 'name' => 'elroy'},
                              { 'name' => 'sam' },
                              { 'name' => 'bobby'}
                            ],
               'No'      => '1',
            }
         ];

HTML:
<tmpl_loop parents>
   <tmpl_var Lead>
   <tmpl_var Wife>
   <tmpl_var Friend>
   <tmpl_loop Son>       
      <select>
         <option value="<tmpl_var Name>"><tmpl_var Name></option>
      </select>
   </tmpl_loop>
</tmpl_loop>