Conversion
Proceed as follows:
Using the Configuration Manager (page User data > Address books > Settings)
Display name conversion
If you did not enter any data in the Display name field when you created a contact, the display name is generated automatically from the entries in the First name and Surname entry fields, in accordance with the predefined conversion process, when you save the entry.
Surname,First name: Display names are formed from the surname and the first name (separated by a comma and a blank space).
First name Surname: Display names are formed from the first name, a blank space and the surname.
* Note: If no data is present either in the First name entry field or the Surname entry field, the display name is generated from the entry in the Company entry field.