I also have a roman numeral suffix and experience the exact same issues all the time, its insane! I understand what my parents were going for with the suffix but that tradition will end with me if I have kids.

The credit agencies also started attributing debt to my name from someone with a very similar name and social. Of course they don't like paying their loans and so every once in a while my credit tanks while I go through the process to get it cleared up. As far as I've been able to find there is no long term solution to this, I just have to deal with it every couple years.