Please read the following table in HTML format from a webpage and then answer the question in detail according to the table. Each table cell is defined by a <td> and a </td> tag. Each table row starts with a <tr> and ends with a </tr> tag. 'rowspan=m' and 'colspan=n' represents a cell spaning over 'm' rows and 'n' columns.

Webpage title:
Holy Roman Emperor
Table title:
Ottonian dynasty
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=1 > Image </th><th colspan=1 rowspan=1 > Name </th><th colspan=2 rowspan=1 > Reign </th><th colspan=1 rowspan=1 > Relationship with predecessor(s) </th><th colspan=1 rowspan=1 > Other title(s) </th></tr>
<tr> <td colspan=1 rowspan=1 > - </td><td class="highlighted"  colspan=1 rowspan=1 > Otto I, the Great (912–973) </td><td class="highlighted"  colspan=1 rowspan=1 > 2 February 962 </td><td class="highlighted"  colspan=1 rowspan=1 > 7 May 973 </td><td colspan=1 rowspan=1 > Great-great-great grandson of Louis I </td><td colspan=1 rowspan=1 > King of Italy King of Germany Duke of Saxony </td></tr>
<tr> <td colspan=1 rowspan=1 > - </td><td class="highlighted"  colspan=1 rowspan=1 > Otto II, the Red (955–983) </td><td class="highlighted"  colspan=1 rowspan=1 > 25 December 967 </td><td class="highlighted"  colspan=1 rowspan=1 > 7 December 983 </td><td colspan=1 rowspan=1 > Son of Otto I </td><td colspan=1 rowspan=1 > King of Italy King of Germany </td></tr>
<tr> <td colspan=1 rowspan=1 > - </td><td class="highlighted"  colspan=1 rowspan=1 > Otto III (980–1002) </td><td class="highlighted"  colspan=1 rowspan=1 > 21 May 996 </td><td class="highlighted"  colspan=1 rowspan=1 > 23 January 1002 </td><td colspan=1 rowspan=1 > Son of Otto II </td><td colspan=1 rowspan=1 > King of Italy King of Germany </td></tr>
<tr> <td colspan=1 rowspan=1 > - </td><td class="highlighted"  colspan=1 rowspan=1 > Henry II (973–1024) </td><td class="highlighted"  colspan=1 rowspan=1 > 14 February 1014 </td><td class="highlighted"  colspan=1 rowspan=1 > July 13 1024 </td><td colspan=1 rowspan=1 > Second cousin of Otto III </td><td colspan=1 rowspan=1 > King of Italy King of Germany Duke of Bavaria </td></tr>
</table>
Question:
Which house name was a notable hereditary holder of the title ‘Holy Roman Emperor’?
Answer:
Various royal houses, at different times, became de-facto hereditary holders of the title, notably the Ottonians (962–1024).