I have the same problem - the story about de Maisied being anglicised to Maisey seems to have no foundation. I am assuming to an extent that the story has some foundation but that perhaps its one of the female lines that had the Huguenot silversmiths as ancestors and that the names have been corrupted or crosseed over in the telling. I know the ancestors in question lived in Spitalfields and Shoreditch, so the likelihood of Huguenots contributing to the tree is quite common, but I have given up on the particular name quoted. One Day! Sylvia M