George (Sequoia)'s father was a fur trader who married into the Cherokee Indians. George was half blood, married a Cherokee (multiple wives) and he then wrote the Cherokee alphabet. One of the problems that my cousin had is that she was unable to link one of our relatives, a son, back to the birth records kept by the Cherokee nation. My cousin says that our ancestor's parents names match those on a registry at the Cherokee nation, but that the son was never registered, so we can't be sure and the Cherokee nation won't recognize our ancestor.
Most of the test results on my Y DNA come back as English, with some Scottish, but all from your part of the world (i.e. NW Britain). So, I would think that I could be related through a common ancestor.
The spelling of the Guess name also could have changed over the years. My Aunt was the family member who would tell us what history she knew. She never told me about Sequoia, but told me of old family pictures that showed a women with very dark skin who appeared to be Indian, she said there was no name written on the photo, and she did not know who the photo was of. When my Aunt passed away, her kids threw out all her photo's, records, etc., in cleaning out her personal items. I was much too young then to even think about wanting them one day.”