God in HP World

[Ronald Rae Yu]

No: HPFGUIDX 34084

I've already searched the HPfGU Religion FAQ and
didn't find these things.

I still ponder on the existence of God (or some god)
in the HP world. I've noted the times people
(particularly Wizards) used the term 'God' in the
books:

'God, this place is going to the dogs,' said Malfoy
loudly. 'That oaf
teaching classes, my father'll have a fit when I tell
him.'
-PoA6

'My God,' said Lupin softly, staring from Scabbers to
the picture in the
paper and back again. 'His front paw...'
-PoA19

'Don't tell me you don't know?' he [Draco] said
delightedly. 'You've
got a father and brother at the Ministry and you don't
even know?  My
God, my father told me about it ages ago...'
-GoF11

'My God - Diggory!'  it [Fudge] whispered. 
'Dumbledore - he's dead!'
-GoF35

My questions: Are these just expressions with no
religious significance whatsoever? I noticed that the
capital 'G' god is used. What god are they referring
to? Expression or not, does this prove the existence
of a god (and their recognition of its existence) in
the Wizarding World?

What about Harry's having a godfather? Is godfather
here a Christian / religious thing?

Also, there is the 'St. Mungo's' wizard hospital. What
earned Mungo the title 'saint'? If he is indeed a
saint in their muggle world at least, why name the
hospital after a saint?

Just wondering.

-Ron Yu

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