Harry, life debts and the meaning of slytherin

[werebearloony]

No: HPFGUIDX 56195

I was catching up on old messages when and as these things usually do 
numerous ideas, which actually turn out to be questions, hit me like 
a ton of bricks.  Also as I'm fairly new here if these have been 
discussed to the point of exhaustion please just point me to the 
correct post.
1) Does Voldemort now owe a life debt to Harry?  After all Harry did 
help (not voluntarily but he did help) restore V. to life.  So then 
V. is definitely in Harry's debt, (Wormtail's too but that's less 
important) and could this someday save Harry's life.  Dumbledore said 
that this life debt stuff was "
magic at it's deepest most 
impenitrible."(POA) So even V. who is playing around with life and 
death already shouldn't be able to get around the fact that he owes 
his life to Harry.
2)   Think of the way Slytherin is spelled,  look at the last four 
letters of it Erin, I hate to bring this on any Erins (other than my 
best friend who I told and is now bemoaning her apparent evil 
nature).  Did JKR have an enemy named Erin, or does she have a 
problem with Ireland (the Celtic translation of Erin).  Why would she 
hide that name in the house with the most dark Wizards?  Can(has) 
anyone find the parts that make up Slytherin (as a word)? 
I'd go further on all of these but my teachers are piling on 
homework, don't know what they're getting at, exams are ages away.
--loony, who has driven all around her crazy by mentioning how many 
days till book five at least three times a day.