JKR's Edinburgh Festival Q&A is on her website now (under news)

[juli17ptf]

No: HPFGUIDX 110147


> 
> Among other things would explain why Voldemort has been 
inexplicably 
> trusting of and lenient with Snape, as well as the lack of any 
> concrete information about Snape's family/ancestry. 
> 
> Thoughts on this theory? Has it been advanced before? 
> 
> Julie

Oops. Correcting myself, I really meant that Snape would be related 
to TR's mother's family. The Riddles were Muggles. We don't know the 
family name of TR's mother, as I recall. Could it have been Snape?

Julie