Currently, there is no way to prevent the auto-generation of the name that appears on the Report Name field, however, you can edit the Report Name field by removing the prefix and saving the change.
Steps to Duplicate1. Go to the Profile module
2. On the top right, the 5th button over from the left, click on the New Profile button
3. On the Profile 1 tab that opens, type in a prefix, first and last name
4. Note in the Report Name field that the Prefix is automatically added in front of the name.