An idea...

[Lisa]

No: HPFGUIDX 171798

--- In HPforGrownups at yahoogroups.com, "Eddie" <harryp at ...> wrote:
 I don't recall this in canon.  In fact I remember that Neville's
> family thought he might be a squib until his uncle (grandfather?)
> dropped him out of a window and he bounced.  Would his family have
> known he was already "put down for Hogwarts" and therefore know
> Neville was no squib?
=============================

Lisa:

I don't know that any family knows their child is "put down for 
Hogwarts" at birth -- we don't know that James & Lily knew about 
Harry.  We only know that Hagrid knew that Harry was, and likely that 
is because Dumbledore told him.