I would be very interested in knowing the history of the name and where in Germany your family lived. My Carl Buff and wife Maria Theresa Liepold Buff came from Germany to New York about 1852. He died in 1859. She gave Saxony as her birthplace on the 1860 census.
Buff is a rather uncommon name in the US. I have been having trouble finding much info about it. It has been transcribed as Puff in many documents over the years.