Here's a quick list I compiled of 'Official' Noble Families mentioned that may be of some help to GMs and Players alike. I've thus far only listed the House not specific members nor have I included Navigator Families nor Rogue Trader Families. Hope its useful, let me know if there are any mistakes or omissions, which is likely as this was just a quick 'casual pass'. I'll likely make more detailed entries later, feel free to add your own, Noble house used in your games or ones from suplements I may have missed.
*Family is in Decline, Fallen out of Favour, or Ruined.
"In what vessels did they pour forth their polluted essences, in what form did they hope to subjugate the universe, with whose hands do they, even now, reach across the frontiers of space in vain aspirations of conquest? It is both obviously and painfully clear that it is WE who they venerate they wish nothing more than to be like us, to be like Him whose children they envy."
~Reclusiarch of the Eagle's Heirs to Lord Inquisitor Uxoris
On the Supremacy and Virtue of Humanity