Help!

You may all know that I'm terrible at picking out titles for my stories. I'm currently working on an original, and have spent the three days bothering my friends because I can't come up with a title and neither can they. Luckily, I had a burst of inspiration last night.

And yet, and yet...

So, there's this family. They're an 'evil' magical family. The 'evil' in quote marks because the current generation is deceitful, nasty and incredibly selfish, but do not glory in destruction or want to rule the world. They're very gentrified; way back when they were the Lords of the Manor, and are still rich. They are associated with dragons and snakes (which is part of why they live in the English countryside - since St Patrick, no one of their blood can visit Ireland). They're near Stonehenge.

WHAT IS THEIR NAME?!

It's vitally important, considering how many important characters come from this family, that it be a good name. I would like an ssss sound since they're so serpentine. What can it be?

Am considering:

Salisbury - for the place, obviously
Selosiss (Syl-oh-siss) - my favourite, but sounds like a disease
Wyverns - some play on 'wyvern' would be good
Ouroboros - some version of this; it's a mythical Celtic snake

So... suggestions? Help? Could you read 'Poppy Selosiss' as a character name and take it seriously? Do you know any snakes from English/British mythology (that is to say, Celt/Saxon/Viking/Roman-at-a-pinch - damn those invaders) with names I could use or edit? Do you think I should stop stressing about this and just write my damn essay? All opinions welcome.