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Erin all the way =w= <3
Erin is really a group of four people, so she wouldn't have any parents.
Erin Hunter is really a group of four people, so I don't know if she would have a universal address.
Here I did the leg work for you. http://en.wikipedia.org/wiki/Erin_Go_Bragh Paste and copy this into your address bar. Wikipedia is a wonderful thing.
She was a triathlete.