I know that a double-I in a name is common in Finnish and Estonian (
Iisakki,
Katariina, etc.), so it could just be a Finnish or Estonian spelling of
Evangeline.
Please rate my personal short name lists (the latter includes combos):
www.behindthename.com/pnl/69381www.behindthename.com/pnl/69381/91835 (updated)
http://greens-end.myminicity.com/env