Preventing people from using a nickname!?

Gi
Stuck on our baby girl's name. I love the name Addison, however, I don't like the nickname "Addy" (& our niece is called "Maddy"). I don't need a nickname. However, my husband is convinced people will just call her Addy which I just can't stand!! So, I'm wondering if anyone has had similar experiences with their children and how it went? Also, we're considering using "Andy" as a nickname to not use "Addy". Thoughts on the nn as well!?