How about this one?

[kiricat2001]

No: HPFGUIDX 40557

--- In HPforGrownups at y..., "bkb042" <brian042 at h...> wrote:
> Snape is Lily's brother.  It has been noticed that "Severus Snape" 
> is an anagram of "Perseus Evans". We also have precedent for 
> siblings to be split apart during Sorting (Padma & Parvati Patil). 
> We have evidence that Petunia is a liar with regard to how the 
> Potters died. She is also bitter and spiteful towards Harry in 
> particular in much the same way that Filch is towards the student 
> body of Hogwarts in general.

I've got problems with this theory.  We know that Petunia hated the 
idea of a having a witch in the family.  Wouldn't she also hate the 
idea of having a brother who was also magic?  She never mentions 
him.  If Severus was her brother, why wouldn't either Petunia or 
Vernon ever say anything to Harry about how unfair it is that they 
have to raise him, rather than his Uncle Severus, especially since 
they so resent his presence in their house?  

For that matter, why would Snape be Snape and not Evans?  Would there 
be a reason for him to not carry the family name as a child?  Unless 
there is a believable reason that Severus was taken from the family, 
or given up by the family at such an early time that neither Lily nor 
Petunia realized that they had a brother.  I don't know - that seems 
like a stretch to me.

And, is it not stated somewhere in one of the books, that Harry has 
no other living relatives besides the Dursleys, or am I making that 
up?  

Marianne