1772 T. Nugent tr. J. F. de Isla I. 145 She was not a common woman, but a geniusess [Sp. giganta] and an elegant writrix.
1902 R. J. Shores 5 It was the product of the brain of a geniusess, living in Butte, Montana.
1919 June 29/1 Platform geniuses and geniusesses very closely resemble regular human beings at the start.