Holly itself is a cute and short enough name, other nicknames you can use are:
Hoey (like Zoe) Lee Holz Olly Holzie Dolly
The name Holly was taken from the name of the holly tree, an evergreen whose stiff, glossy, sharp-pointed leaves and clusters of red berries are used in Christmas decorations. It is derived from the Old English holegn (to prick).
Variations for Holly: Hollye, Hollie, Holli, Holley, Holleigh, Hollee
See famous people named Holly at FamousBirthdays.com.
Get tons of ideas for baby names plus get tips for what to keep in mind as you're choosing a baby name at BabyCentre.