Apple added a setting for iOS 7 to display short names (Lynn) or full names (Lynn Fullerton) at the top of your Messages window. This change to a short name default can be an issue, especially if you’ve got more than one Lynn in your life. Good tip.
Short name setting for Messages app
If you run into this situation but like short names generally select “Prefer nicknames” and then populate the nickname field for the contact with something more personally identifiable (e.g. “snuggle-bunny”).
I don’t see a setting to change to full or short name in Settings nor the app. Where can I change it?
NM, I found it in the Settings > Mail, Contacts, Calendars
In case you didn’t know this, a click in the headline link will take you to the referenced article. The article has all the instructions. Glad you found it though.