Well...no one is quite sure who difficult child-father's father is (it was narrowed down to about 6 candidates, but they couldn't get any closer than that), so I guess that removes him.
difficult child-mother (last I heard anyway), has been pretty-much in a permanent state of psychosis for the last few years so I think that removes her too.
Other than those 2, I kind of want to keep the rest of the removeds...they're a lovely bunch of coconuts.