My maiden name is Anderson, but as far as I know there is no relation to Richard D. Anderson the actor. But at one time there was a friend of my families who had the last name of Anderson and he was related-distantly. I remember he spoke about going to a family reunion, quite a few years back now, and he met RDA there. I seem to recall that he said that it was before he made a big name for himself.
Our friend's name was Cliff. He is now dead, but he has family still alive. I think a son that lives in WI maybe? I honestly can not remember.
I do remember that he spoke of having a Norwegian or Swedish background. He mentioned that he had several distant relatives that spelled their last name andersen or maybe even two s's. This has been like 20 yrs ago and my memory is not very good.I know this is not much to go on, but I hope it helps in some way.