R.A.B.? Not Regulus Black!! Borgin and Burkes?

[Chys Lattes]

No: HPFGUIDX 134063

Rowen: As for your guess that the RAB is Borgin, the problem is that 
he has no motivation to destroy the locket. Borgin is clearly a dark
wizard, and deals with DEs every day. Why would he want to risk
alienating his best clients by trying to kill LV? Also, RAB says he
will soon be dead, and mister Borgin is very much alive.


Chys:

What about Burke? It's called 'Borgin and Burkes', right? So where is 
the other guy at?

(Or is there another guy?)

Chys, very curious about this one. (and the fact that most of the 
shops are like 'Flourish and Blotts',  old shops but are those to be 
considered last names too?)