My last name is Richerson; not Richardson, Richarson, or Richerdson. To me, my last name is the correct spelling but I am a little biased.
The story in our house is that my 3rd Great Grandfather and his brothers went off to fight in the Civil War. At some point during their enlistment, the spelling of their last name was changed from Richardson to Richerson. The theory is that the boys did this to ensure receipt of payment. Apparently, there were other Richardsons fighting in the war and my relatives wanted to make absolutely sure that they got what was theirs.
4 Generations of Richersons
Thanks to the man on the left, Wright Montillion