这里的技巧是用分类法的术语创建一个数组并对其进行排序。在进行排序之前，我们需要划分全名“；约翰·多伊；“分隔字符串”；“约翰”；和；能源部；。然后我们可以按姓氏对姓名进行排序。

其余的说明和文档都在代码中。

这应该是可行的，但我还没有用实际的WP术语对此进行测试，所以请先进行测试。

<?php    // Get the taxonomy\'s terms
$terms = get_terms(
    array(
        \'taxonomy\'   => \'supporter\',
        \'hide_empty\' => false,
    )
);

// Check if any term exists
if ( ! empty( $terms ) && is_array( $terms ) ) {
    
    // Create a new empty array of supporters ( $supporters ) which will include first and last names.
    $supporters = [];
    foreach ( $terms as $term ) {
        // Divide the whole name to different words.
        // First word ( name_divided[0] ) will be the person\'s first name
        // Second word ( name_divided[1] ) will be the person\'s last name
        $name_divided = explode( \' \', trim($term->name) );
        
        // We\'ll create an array $supporters which has the following structure:
        // $supporters[0] = array (
        //      \'firstname\' => \'John\',
        //      \'lastname\' =>  \'Doe\' ),
        // )
        $supporters[] = array( \'firstname\' => $name_divided[0], \'lastname\' => $name_divided[1] );
    }

    // Here\'s the magic. Sort the array by last name
    array_multisort (array_column($supporters, \'lastname\'), SORT_ASC, $supporters);
    
    // Run a loop and print them all
    foreach ( $supporters as $supporter ) { ?>
        <li class="supporter-name"><?php echo $supporter[\'lastname\'] . \', \' . $supporter[\'firstname\']; ?></li>
        <?php
    }
} ?>

Edit: If the name list consists of names that has 3 or more names, ie. "John of England".

$supporters[] = array( \'firstname\' => $name_divided[0], \'lastname\' => $name_divided[1] );

//Get all other names than last name
        $firstnames = \'\';
        for ($x = 0; $x < (count($name_divided) - 1); $x++ ) {
            $firstnames .= $name_divided[$x];
            
            // If this is not the last one of first names, add space between names
            if ( $x != (count($name_divided) - 2) )
                $firstnames .= \' \';
        }

        // Use last word (key in array) as last name
        $lastname = array_pop($name_divided);
        
        $supporters[] = array( \'firstname\' => $firstnames, \'lastname\' => $lastname );

英国约翰