I don't have you in my database James, you did not provide enough information about your direct line for me to make a connection. Are you descended from William, Daniel, John or Christain Jr. With the Senneff spelling and the Illinois connection, I would think it would be William.   I have 38,741 names in my database.  Daniel went to So. Indiana, John went to Illinois for awhile, then back to PA where he died, and they only had 1 'n' in the name, Seneff, original is Senff.  Christain Jr., Philip and Jacob stayed in Ohio and kept the Senff spelling. Solomon died in OH early on about 1852-4.  Susanna, Catherine stayed in OH, Barbara went to Missouri and died there.

I have a whole heap of data on Michaels line as well, but, like you, I have not been able to make the connection of his line to our Christain.  And I have found nothing to connect to the Edward Charles Senff line from Evansville, IN, to either Christain or Micheal. 

I would be in favor of a DNA project, but it has to be all done with male descendants.  Everyone of the male descendants of my direct line to Solomon are dead, with one exception, my first cousin Gerald, and he is not well he lives in Oregon.  Only the girls survive.  There are some second and 3rd male cousins in Oregon & I do have some male second cousins in Washington state, who are descended from my Great Uncle William Sherman Senff, a brother of my Grandpa Charles Edward Senff. 

I am in contact by e-mail with some of the descendants of Michael, all female.  Maybe we could find some males willing to get tested in that line. 

Conrad came at a much earlier date than Casper from Germany.  what is your e-addy?  I'll send you my notes that I have collected.   donna.mata1@verizon.net