closest Find
HTML
<script src="http://code.jquery.com/jquery-1.4.4.min.js"></script>
<table title="outer">
<tr>
<td>
<table title="inner">
<tr>
<td>
<input type='button' id='Sample1' data-type="one" title='one' />
</td>
<td>
<input type='button' id='myId' />
</td>
</tr>
</table>
<table title="sibling">
<tr>
<td>
</td>
</tr>
</table>
</td>
</tr>
</table>
JavaScript
alert($('#myId').closest('table').find('[data-type="one"]').attr('title'));