My Pashons were in IL. and surrounding states by 1850 or so.
I've found their named spelled Passion/Pachen/Pashon,etc. I also
have had a hard time finding anything in census reports, even when I
was fairly certain of where they lived at certain times! So you might
try Rootsweb search with alternate spellings soundex. Also, I've seen
an early Paschen reference that implied Dutch/German origin, but my Pashon
claimed Belguim as bp., though his son put France on later census for his
father's bp. I think Belguim is most probably correct (from the source himself).
I have also seen webpages of genealogy that claim Pashon was a corruption of
Bushong (I guess this would imply French origin?)- with time passage regional
dialects I suppose anything is possible! Hope this helps: if anyone would like to
search my Pashon line it's at http://www.uftree.com/UFT/WebPages/yvonneanspachwhite/TINKLE...
my email is firstname.lastname@example.org