My grandfather Landau had a sister who marrIed an Edwards. We have completely lost touch with that side of the family. Her name was Catherina "Kate" Landau 1886-1939. She married Albert "Bert" Alexander Warren Edwards in July 1903 in London. They had 3 children : Margaret 1904 who married George Kimble and had 8 children; Lionel 1905; and Carl 1907 who had 3 children Neville Reginald and Theresa. That's it. Admittedly they are probably not of the 1820 settlers family.
In other parts of the family tree I am looking for Howell Edwards and Arthur Scudamore Edwards.