single parents in HP

[stillginger1966]

No: HPFGUIDX 55320

I apologize if this has been brought up before, but has anyone else 
noticed that there don't seem to be many single parents in HP?  

Tom Riddle and Hagrid are the only ones I recall being from 
divorced/seperated families.  In both cases, it was a non-widarding 
parent who left.  (Muggle for the former, giantess for the latter)

The only other times I recall only one parent being mentioned are:

Neville's Gran, who could easily be a widow.

Colin Creevey, who only mentions that his father was a milkman, but 
makes no mention of his mother (although this may be for many 
reasons, none of which have to do with her absence or presence)

Fleur, who's mother came to the tournament, but not her father 
(again, his absence from the tournament may not indicate his absence 
from her life)

Did I miss anyone?

Most of the parents are not mentioned at all, but of those who are, 
they all seem to be married.

I confess I don't know current British statistics for single heads of 
households, but as JKR was a single mother when she wrote these, I 
kind of find it odd.

Any thoughts?
Ginger, who is still!Ginger despite being "terminated" by Yahoo 3 
times!