R.A.B. is Regulus Black

[jakedjensen]

No: HPFGUIDX 133322

I think R.A.B. is Regulus Black. His history is recalled by SB, but 
(1) SB admits that he had to track this info down about his brother, 
(2) the information could be wrong, and (3) even if it is true, all 
it does is give Regulus a motive (i.e., he decided to leave LVs 
service).

JKR also gives a number of possible middle names for Regulus (i.e., 
other family members names) that would give him the initials R.A.B.: 
Alphard, Araminta, & Andromeda. Since "Uncle Alphard" seemed to have 
lots of money, it is possible that Regulus's full name is "Regulus 
Alphard Black." Sure, Alphard later got removed from the family tree 
(because he left his money to SB), but you can see them trying to 
butter him up before this (all of this from, OotP, pp. 111-113). 

In addition, although I am having trouble locating it now, Regulus is 
mentioned again in HBP. Help from anyone locating this passage would 
be appreciated. I remember it was in reference to how quick and 
unforgiving the death eaters are about members that leave.

Anyway, that's my idea. Let me know what you think.

Jake