To change the name you see in Wickr for your Contact, you can edit the nickname. This can help you to easily see who the Contact is and organize according to department/company/organization/rank/status/time zone or however you prefer to organize the Contacts in your Contact list.
1. Select the (i) next to the Contact's name in the Contact list
2. Tap/click on Edit Contact
3. Type the new Nickname and press enter/tap "Edit" to save the name