format a column of names in libreoffice calc

I have a column of about 1700 names of people in no particular order.  The formats of
them seem to be:
   1) john doe
   2) john c doe
   3) ohn c. doe
   4) john calvin doe

I would like them to be:
   1) john <space><space>doe
   2) john<space>c.<space>doe
   3) john<space>c.<space>doe
   4) john<space>calvin<space>doe

I'm trying to make this so it can be put into columns (first name), (middle name), and (last name) and then sorted.by ln, fn, mi to find the people.  It was an OLD set of burial books for a nearby cemetery that were handwritten and wearing out.  I'm trying to make them electronic or just print new ones.