I prefer it as a nickname but I do believe it's one of those that can stand up on it's own. After all it is used often on it's own now these days. I prefer
Abby, and don't mind
Abbie. But
Abbey just looks off to me, I can't explain it.
"LUPINWOLF: I KEEL YOU, SIRIUSDOG!
SIRIUSDOG: *whimpers*
LUPINWOLF: I KEEL YOU TOO,
HARRY POTTER!
HARRY: AHHHH"
From m15m. A summary of a scene in
Harry Potter and the Prisoner of Azkaban