I definitely go for Regulus. And even JK's evil look could mean only this.
And thats why he went for the Horcrux. Didnt Sirius say in OOTP that when Regulus realized what Voldemort was up to, he tried to back out and was kiiled by Voldemort. Maybe he was successful in destroying the Horcrux and made Voldemort even madder

hm...i still dont know... i mean i dont think it is Regulus like i said before....hmm maybe a character mentioned in passing or maybe a character that we never met before

if it was reguals,(just a thought) wouldnt rowling want it to be a mystery,maybe its not a real name but a fake name only the dark lord would know, gosh this is sounding stupid to me but

it makes sense......regulas black......he knew Voldy didnt he? .......yes it makes sense......

*Danielle*

i would have to agree. in OoTP (i think) there is something about a locket in his stuff. i'm sorry i don't have the quote..but..could the locket posably be the Horcurx?

I think it's Regulus too! I was just sitting in my room about to E-mail my friend when she asked. Then it sorta struck me! Maybe the locket is the Hocrux, because... didn't the note say that he replaced it with a fake one? i dont remember it was like last week lol

Albus Percival Brian Wulfric Dumbledore. Order of Merlin, First Class, Chairman of the Internation Confederation of Wizards and Supreme Mugwump of the Wizengamot.

Albus Percival Brian Wulfric Dumbledore. Order of Merlin, First Class, Chairman of the Internation Confederation of Wizards and Supreme Mugwump of the Wizengamot.
Former Headmaster of Hogwarts School of Witchcraft and Wizardry. Famous for his defeat of the Dark wizard Grindelwald in 1945 and for his work on Alchemy with his partner Nicholas Flamel. Professor Dumbledore enjoys chamber music and ten pin bowling.(?)

woah your the mother of all facts about dumbledore...that was impressive!!! lol......thanks for that....unbelievable lol!!

I really do think that Regulus Black could be 'R.A.B'. His death fits in perfectly to the equation...Harry by that time was already fifteen right? In the note left in the locket 'RAB' wrote:
The fact that the note started off as...'to the Dark Lord' would most likely mean it was from a Death Eater.
Another good point is that in the end he says "I face death in the hope that when you meet your match, you will be mortal once more"
Why does he say "your match"? Maybe it's because they hadn't found out who Voldy's match was yet...maybe the real hocux was taken before Harry was marked as Voldy's equal...
Also from the Order of Phoenix pg.112
So Regulus was a Death Eater...which might explain the 'To the Dark Lord' heading of the note.
(cont. from pg.112)
Maybe since he knew that he was going to be killed, he decided to get back at Voldemort or something and took the real horcux. Which could also explain the 'I know I will be dead long before you read this' sentence in the note.

Wow. I wrote alot...sorry! I might be all wrong about this, but I just thought I'd post this up since I put in a lot of crucial quotes from the book that would show how likely it is the Regulus Black was 'R.A.B'.

may be it wasnt regulus black, may be the r.a.b were the Initials to a nick name of some one else. like half blood prince can be H.B.P. and then also, regulus dosnt seem smart enough to really understand or know even the dark lord he served. wouldnt it have to be some really dark wizard that wanted voldie down and out for the count to gain his own power, or a really smart/ wise auror? just an idea.

but would voldemort know that harry was going to get into griffendor, if harry was a descendent of giffendor, would'nt dumbledore have told harry earlier on. but if he was though, WOW!!!! thats so obvious, i never ever thought about the griffendor thing before. the whole plot would be going back to the beggining of time when griffendor got into a fight with syltherin. sorry, i'll get back on subject, i think a good question is; can you make your wand a horcuxes... or however you spell it? i mean. know one is going to be able to stael that out from under his nose.

When DD and Harry visited the cave, he told Harry:

So, if R.A.B. was Regulus Black, would there have been another person to help him? Even Dumbledore, who is an extremely powerful wizard, did not retrieve the locket alone.

Any ideas who helped?

Wait, wait, wait, wait wait wait ~! I thought Regulus Black was supposed to be dead ! How did he get there ? What does "A" stand for ? And my opinion on who helped Regulus even if he did do it - Lestrange ? Bellatrix or Rudolphus lestrange, who could have been his dearest ?

Yeah he is dead, he did this (got the locket) before Voldemort had him killed. The note does say "I know I will be dead long before you read this".

So I think Regulus found out, knew the dark lord was going to kill him, stole the locket, and then got killed.

A is a middle name. While looking at the Black family tree, I noticed that a lot of Regulus' relatives (uncles, grandparents etc, can't remember exactly) had names beginning with A. So I assume his middle name is named after a relative.

Who wouldve helped Regulus? hmmmmmmmmm, I think he was sent on Voldemort's instructions to check whether the Horcrux was safe so Voldemort might have all the protective measures around it lifted so that Regulus can check the Horcrux but I think he seized his chance and destroyed the real one and put a fake one in its place

After reading all you guys posts.....i feel the best match yet for RAB is regulus black.....but the name may not be even real name also.....it might be some alias which voldemort knows.......one never know.......all we have to do is keep guessing until book 7 comes out

yup i guess regulus it is !

I can't be bothered to read through ALL these posts, but I think it is regulus or Amelia Bones. But isn't it a fact that Dumbledore said "it would have been impossible without two people." ? Then RAB must be two?

I do believe it could be Black because there has been so much said about black in HBP. He was never really spoke of until this book. Also every character that has been mentioned slightly has became a big deal someway. Like Nick who created the stone!! he only played a small part on the train until the end. I believe it will be Black. He has to play a larger part!!

True... True, I won't jump to any conculsions concerning that person initials. She left it vague for a reason so I won't make a big deal out of it until I get more charcaters initials. As, far as I am concerned Regulus is dead. I don't mean to be sexist or down putting genders but I am sure a woman wouldn't mess with Voldemort not unless she was working with him or running from him. Amelia Bones... I don't question. What would be her reason for going after the Horcruxes. I don't doubt JK but I very convinced that she doesn't have the locket!

i dunno if any 1 mentioned this it cud be 3 people

R = Rubeus
A = Albus
B = ? ( a old friend of dumbledores perhaps)
if u want to now y i chose 2 gud sided characters read my theory in the death section page 13
hyperlink to it - http://www.snitchseeker.com/vb3/show...&page=13&pp=25

I think that Regulus Black is really R.A.B. Someone told me that in 5th book there's a scene when everyone's cleaning the house and they find a heavy locket that no one can open. What do you think?? Can this locket be the real Horcrux??

Could be. Nice theory though. If anyone other than Dumbledore or Harry, I mean someone from the order knew about the Horcruxes, then they wouldn't have thrown it away. But then again, Dumbledore couldn't exactly have discussed his opinion and what he suspected as horcruxes with everyone else did he ?

It's a good theorie and prehaps Regulus Black has been killed, because he knew the secret about the Horcrux.