Sammy - From what I am told, there are relatives in Canada so I suppose there is a possibility.
Rick - Yes, from what I have read, King Louis favorite was Dauphine, which is interesting. Now that you mention there are a few called Dauphine, one will never know I suppose which it was?
Jds - yes, I'm growing in pots but would put one in the ground if I could find this variety, I have enough room. I got in quite a bit of trouble for school kid calling me Dolphin back in the day. I just had to set them straight. :)