Here's some info I have found on researching, an expert who helped said that the Funcannons, Funcanons, Von Cannons, and Foncanons were originally the same names. I think phonetic spelling and the need to simplify has had something to do with this change. My recent ancestors spelled their name Foncanon. My ggrandfather was Henry Foncanon (or Foncannon) and his daughter, my grandmother, was Harriet Phigenia Foncanon. A large family of foncanons, early settlers in Kentucky are scattered all over the US. I live in Texas and Louisiana, but my part of the family came from Missouri, though not originally from there.