Gratton186,
I have a possible candidate for your Christian Yauch who ended up in Canada, but he was not from Detwiller (where did you get that information from). He was from Schwenningen and his father's name was Georg, not Heinrich.
Check out this record:
http://wc.rootsweb.com/cgi-bin/igm.cgi?op=GET&db=jss_jau...If you click on his father (Georg), you'll see that this Christian had sisters Anna and Agatha (as well as a few others) and that Anna may have emigrated with him.
As you'll see from clicking on Pedigree, I've got Christian's ancestors back to the 1400s. Those in my online tree who have ALL CAPS for last names are direct-line ancestors of mine; as you'll see there are many in Christian's pedigree, meaning that -- if this is indeed your Christian -- you and I are cousins.
-- Jillaine Smith
Washington DC
http://freepages.genealogy.rootsweb.com/~jillaine/jauch/