Hi Sarah M. Tyzzer: I am related to the Tyzzers of Cornwall (esp. St. Austell area) via my grandmother, Maggie Tyzzer Toy. Her father was Richard Tyzzer. There is some info. in the 1870 census. I live near Boston, Massachusetts, USA. Would be glad to exchange genealogy info. w/you. I've been told Tyzzer was originally French. Any info on this?