Please add method="post"
to form like
<form id="form1" method="post">
<?php foreach($results as $key): ?>
<?php echo $key->ID.$key->display_name.$key->mg_nobility; ?>
<!-- Append the id to the end of this -->
<input type="text" id='edit-value-<?php echo $key->ID ?>' value="" />
<!-- Use the data attr instead -->
<button data-rowid='<?php echo $key->ID ?>' class="edit_nov">Submit</button><br>
<?php endforeach ?>
<input type="hidden" name="del_id" id='row_del_id' value="">
<input type="hidden" name="up_id" id='row_up_id' value="">
</form>