How to insert display_name field

Hi there,
I searched on support’s forum and in the documentation but… I didn’t find how to insert display_name of users.

I tried to make a .csv file with these column (in this order): user_login, user_email, user_pass, display_name

But “import user” plugin put the value of column “display_name” in new field called “user_login” below “Extra profile information”. Insted I would to insert this in “name” field (user_login field on the SQL Database).

Thank you very much!