Who does DD have in hiding?

[meltowne]

No: HPFGUIDX 135016

Toward the end of HBP Dumbledore tells Draco he doesn't have to kill 
him.  There are ways to hide him and make it look like he is dead.

Obviously, we've already seen this done in the case of Wormtail, but 
I don't think Dumbledore is planning that kind of existence for 
Draco.  So, what does he have in mind?  And maybe ore importantly, 
who else has he hidden, and are they still in hiding?

Some far-fetched possibilities:

The Prewett brothers (Fabian and Gideon) - we have been told they 
were killed, but were they?  We saw something in the MOM at the end 
of OOtP that turned one of the Death Eaters into a baby.  Not wuite 
in hiding, but could something similar been done to these twins?  If 
their parents had been killed, who would be left to raise them?  
Their sister perhaps?  They would have to be brought up as her own 
children, and most of her other children would be old enough to 
remember them joining the family.  Molly might be disappointed in 
their OWL grades, but would know they were strong wizards.

Lily's parents?  Or perhaps one of her parents, who then married a 
muggle?  We know they are now dead (or did they go into hiding a 
second time?).  Something fishy happened with that family - why were 
her parents so excited to have a witch in the family?  Had her father 
been in Azkaban at some point?  Is that why Petunia knew about the 
dementors?  Did they feign his death, and then request to bury him 
away from the prison - then hide him in the muggle world?  If that is 
what happened, it would explain Petunia's fear of the wizarding 
world - if somebody found out, and there was some reason her whole 
family was targeted, she would again be in danger.

If Mr Evans was in hiding, who was he?  I know it's a big stretch, 
but Evans spelled backwards is Snave - really close to SNAPE.  I 
know, Snape's father was a Muggle, but it's a strange coincidence.