While you could work with such a list, it would make more sense to convert the list to a conventional merge data file, ideally in Excel, in the format below, than to re-invent the wheel to suit your data.
ForeName |Surname |Address1 |City |State |Zip
Mary |Brown |123 Address One |City |State |12345
Then it is a simple matter to use conventional mail merge to create your letters. Or if you want them as separate documents see
http://www.gmayor.com/individual_merge_letters.htm. or
http://www.gmayor.com/MergeAndSplit.htm