nickname help?!

Our little girl is due 11/10/17 and we've had her name picked out since we found out we were having a baby. The name we have picked out is Arbor Penelope. I'm obsessed with her name... the only thing is I can't think of any nicknames! My fiancé suggested Arby, but I just can't help but think of the fast food restaurant. 🙃 kind of growing on me though... I'm thinking about calling her Penny, but I want to have more of a nickname from her first name to call her. Anyone have any ideas!?