Hello,
I would be glad to develop this application for you. I would develop it as a simple .NET program for Windows.
I suppose the input could be a simple text file with comma separated names, but some other format would be acceptable as well. For the pre-/suffix, there could be a simple input field or just another line in a text field, whichever is easier for you.
The output would be in a text file, as you specified. I imagine the project to be done within a day, or two at most. If you would like to discuss any more details, I will be happy to communicate with you here or through email.
Greetings from Germany,
Maximilian Stadlmeier