We were able to track my dad's side back to Germany, just prior to the Civil War (he fought in the war)... but I think that's it, my uncle went over to Germany to research at one point, but didn't have much luck.
On my mom's side... most of the records for one line were destroyed in a courthouse fire in Michigan, so we can't prove that relative wasn't first cousin to Queen Victoria. My grandfather's line goes back to the Knights of the Roundtable - but I don't think we have all the pieces put into place... that side has German, English, and French Canadian. All the research was done prior to the internet...
On my hubby's side, his uncle did the whole family tree... I asked for a copy, at least the first three or four levels to put in J's baby book and Hubby's uncle is a jerk. Refuses to give me anything because I should do the work and just get it handed too... yeah, why would I research hubby's side - not my family.