Probate List Question Direct Mail

[Michael Halow]

So this may seem like a dumb question but I'm new to this. I just got this probate list for one of my direct mail campaigns. What does PR mean? It says PR first name, PR last name?? And in the beginning, it says first name, last name. I need to know the difference between first name, last name and PR first name, PR last name so that I can map them appropriately. Thanks for the help