Hi,
Indeed the marriage cert says 'Joseph'. The 1860 census also says Joseph. As we traced the family through census records, street directories, birth certs of the children, Civil War records, burial records, obits, cemeteries and family lore we are certain that his full name was Frank Joseph Busch. (Actually probably something like 'Francois' as he was from the Alsace region of France -- which is another whole story). Census information was not always given by the person involved or even by a family member; neighbor sometimes provided information.
If you have access to Ancestry.com, you can find the tree under the name 'MorrisonKempton'.
Richard
