The Robinsons sometimes get spelled Robison or Robeson. I dont know if Robertson spelling is same. I also cant tell you if they are all related. In general some of our Y-DNA matches to surnames we have no connection to. This is not only happening in our direct lines but cousin lines too. If our ancestors are not who they say they are and there is no paper to back it up the lines become dead. I could research surnames but if they are not who they say they are there is no point without paper to back up who they were. I have not seen our Robinson cousins Y-DNA test to tell you if they are an 'Oops" in the family too and will wind up matching surnames we never heard of. At this point our only tool in possibly identifying people is through DNA because too many people are not who they say they are.
I only know of one Justice marriage to Martin on record but it's not my direct line. This ties into Bradshaw. I don't know about Webster.
I have spoken to Mimi. She researches the German Setzers and I have Setzer cousins.