Definitely
Kathryn.
Kathrine looks like a typo - and also like it needs to be pronounced "kath-REEN."
Slightly off-topic, but my personal favorite spelling of the name is
Katharyn, though that's far less common than
Kathryn and more likely to be misspelled.
Please rate my personal name lists:
www.behindthename.com/pnl/69381www.behindthename.com/pnl/69381/109399www.behindthename.com/pnl/69381/91835http://greens-end.myminicity.com