How to Customize the Way FLOW Renames JPEGs
By default, FLOW will rename jpegs this way - "Lastname_Firstname-addition number.jpg". If subject Calvin Coolidge was the twelfth image added to the project, his file would be renamed Coolidge_Calvin_00012.jpg
NOTE: It's best to make these changes before importing images. Changes made will affect images added to the project AFTER adjusting the settings.
On the Projects tab under the individual project click on Edit Project Preferences
Under Image Options, select a different naming scheme and select Save. The preview right below the options menus can be helpful for confirming your filenames will be named the way you want.