Do the DEs know that Voldemort is Tom Riddle? (Was: Snape as a Spy. . .)

[yolandacarroll]

No: HPFGUIDX 86532

Carol wrote: 
> 
> Yes, Diary!Tom's comment to Harry was made in CS 
<snip>

In CoS, Tom told Harry that he was using the name 
Lord Voldemort among his "most intimate friends 
only" while he was at Hogwarts. (CoS page 314, US 
edition, paperback)

So some of the higher-up, older Deatheaters should 
know that Voldemort was Tom Riddle.  I also think 
that at least some of them knew he was a half-blood.  
Tom was in Slytherin surrounded by pure-bloods and 
half-bloods who'd grown up in the WW, however Tom 
had grown up around muggles.  Even if Tom knew he 
was a wizard before receiving his Hogwarts letter, 
he would not know details about the WW. Tom's 
ignorance of the WW would have stood out, so at 
least some of his classmates, and thus some of his 
first DEs, would have known his half-blood status.  

Yolanda