The name Thompson and Thomson seem at times to be interchangeable. One must be careful on spelling when doing genealogical research. I have found variations of my name (HANGEY) from Henge to Hengy to Hengey to name it. It does make research much more difficult, but we must remember that a lot of our ancestors did not speak English. Let alone American. I struggled for years to understand my Pennsylvania Dutch grandparents. Years later I studied German and understood what their 'language' was all about. Best Regards from Tennessee! John