For all the Pedigree pages, the string of capital letters at the end are the id of the person that put them online.
Submitter dmixa10094007 is submission id MM3G-VNX.
Submitter hhoward1081323 is submission id MMSC-YDR on 27 Jul 2008.
Submitter rhoffman1102395 is submission id MM73-4PF on 05 Nov 2004.
Submitter jgreen2722076 is submission id MM9R-C9G on 20 Jun 2000.