Mabyn. Welsh, meaning 'youth.' A saint's name. Has my initials in it so I'm a fan. ;) Mab was also a faerie queen, a cute nickname. Abbie would also work if you weren't full of Abbies in your area. Even Mabbie doesn't sound far from popular baby girls names Maddie and Abbie.
Sometimes Ronan thought Adam was so used to the right way being painful that he doubted any path that didn't come with agony. The Dream Thieves (The Raven Cycle) by Maggie Stiefvater. http://asktheravenboys.tumblr.com/