list items from blog and filter by category name

'category_name' => 'Categy Name 1,Categy Name 2' 

PHP

<ul class='myList'>
  <!-- WP Query Parameters -->
  <?php $paged = ( get_query_var( 'paged' ) ) ? get_query_var( 'paged' ) : 1;?>
  <?php //$the_query = new WP_Query( array( 'category_name' => 'latest-news', 'posts_per_page' => 8, 'paged' => $paged ) ); ?>

  <!-- Start WP Query -->
  <?php //while ($the_query -> have_posts()) : $the_query -> the_post();
  $args = array('category_name' => 'Categy Name 1','Categy Name 2','Categy Name 3' => 8, 'paged' => $paged );
query_posts($args); ?><?php if ( have_posts() ) : while (have_posts()) : the_post(); ?>

  <!-- Post Title with Hyperlink -->
  <li>
    <div class='row'>
      <?php
   if ( has_post_thumbnail()) {
      $full_image_url = wp_get_attachment_image_src( get_post_thumbnail_id(), 'full');
      echo '<div class="medium-3 columns"> <a href="' . get_the_permalink() . '" title="' . the_title_attribute('echo=0') . '" class="insightsImage" >';
      the_post_thumbnail('full');
      echo '</a> </div>';
   }
   ?>
      <div class='medium-9 columns'>
        <div class='insightsText'>
          <span><?php echo get_the_date('d-M-Y'); ?></span>
          <h2><a class='insightsTitle' href="<?php the_permalink() ?>"><?php the_title(); ?></a></h2>
          <!-- Display the Post Excerpt -->
          <?php the_excerpt(__('(more…)')); ?>
        </div>
      </div>
    </div><!-- row -->
  </li>

  <!-- Repeat the process and reset once it hits the limit -->
  <?php
  endwhile;?>
  <div class="navigation">
    <div class="alignleft"><?php previous_posts_link('&laquo; Previous Entries') ?></div>
    <div class="alignright"><?php next_posts_link('Next Entries &raquo;','') ?></div>
  </div>
  <?php else : ?>
  <!-- No posts found -->
  <?php endif; ?>
</ul>