Harry and Neville: Brothers?

[Serena Moonsilver]

No: HPFGUIDX 86793

--- In HPforGrownups at yahoogroups.com, "Derek Hiemforth" <derek at r...> 
wrote:
> Okay, a bizarre thought just hit me.  With all the emphasis on
> twins in the HP books, and with both Harry and Neville born on
> the same day, is there any chance they are twins, and that fact
> is being hidden from them?
> 
> I've no canon to support this, of course, but it would certainly
> be an interesting twist...
> 
> - Derek

It doesn't say they were born on the same day in canon, only they 
were both born towards the end of July.

Serena