Tristan and Iseult, or Isolde as it is in some versions, is one of the most interesting Celtic stories. For anyone who is familiar with it, do you think it influenced the story of King Arthur and Geneviere?
I haven't read a lot about the story but I do think it is probably more closely tied to Lancelot and Guinevere for the reasons that Legend stated. Their love was forbidden and Iseult was the wife of the king.