Thanks to a student in Anne DePrince's lab I can give you the good news that it turns that you are desended from William James and Wilhelm Wundt.
It looks like it goes like this:
James and Wundt both advised Clark Hull who advised Carl Hovland who advised Roger Shepard who advised Jennifer Freyd who advised each of you.
Here is a bio by your grand-advisor about your great-grand-advisor:
http://www.nap.edu/readingroom/books/bio73h/hovland.html