How can I parse First, Middle Initial, Last name in Crystal Reports with inconsistent data?

I am trying to parse a Full Name field into First, Last, & Middle Initial in Crystal Reports.  I am able to get the Last name, but am having issues getting the first & middle initial.  The issue lies in the data. (And my lack of knowledge).  The data looks like:

Smith; John
Smith; John D.
Smith; John D
Smith; John David

I was able to parse the last name, but I am unsure how to get the first & middle separated.  I can get them both, but I can't figure out how to get them separated when the data is inconsistent.  
Any help would be greatly appreciated!  Thanks!