if ( $alias_of ) {
        $alias = $wpdb->get_row( $wpdb->prepare( "SELECT term_id, term_group FROM $wpdb->terms WHERE slug = %s", $alias_of) );
        if ( $alias->term_group ) {
            // The alias we want is already in a group, so let's use that one.
            $term_group = $alias->term_group;