Snape and Sirius related? Was: Re: Half blood prince etymology

[ms_luna_knows]

No: HPFGUIDX 122315


--> > > Tonks:
> > > 
> > > [slight snip] Mr. Black marries his son off to a pureblood 
> within a month or 2 of the annulment/divorce and she gets PG right 
> away.. and you  end up with two boys about the same age, from the 
> same father with  different surnames. 
> > > 
> > > It just might work.
> > 
> > Maddy:
> > 
> > I love where this theory is going...but I've got something to add 
> that has just occured to me. (And please tell me, if I'm letting my
> > imagination run away with me.) But here it is: Sirius was the last 
> of the Blacks. Sirius is dead. So who does Grimmauld Place fall to? 
> Could it be illitimate-half-brother!Snape?? Ooh...that would 
> certainly bring about some interesting scenes.
> 
> > Maddy
> 
> Tonks here:
> Yes that is were we are all going with this. Except Snape is not an 
> illitimate child. He is the child of a muggle and Sirius' father 
> from his first marrage, short though it was. (of course the woman 
> could have been a mudblood instead of a muggle, but it would be just 
> as bad to the Black family.)

Ms. Luna,
I know I getting into this late, but wasn't Snape a pure-blood?  I thought in order to get 
placed in Slytherin and be a DE, one must be pure-blood!  I don't mean to shot down your 
theory because it does have some merit, especially in explaining the serious hatred 
between Snape and Sirius.  It does seem to go deeper.