A common question with Snapchat seems to be... how do I change someones name within the app? Hopefully this helps.
- Open the app
- Select the ghost icon or bitmoji icon on the top of the screen
- Select "My Friends"
- Press down once on the name of the person you would like to change
- Select the gear icon to go to settings for the person
- Select "Edit Name"
- Edit and Save
Done and done!