John Blennerhassett (1803-1890) (1803–1890) Parents Dorcas Twiss Arthur Blennerhassett Children Geraldine Blennerhassett Ada Dorcas Blennerhassett Elizabeth Houssemayne Blennerhassett Elizabeth Blennerhassett Georgina Elizabeth Blennerhassett Siblings William Blennerhassett Arthur Blennerhassett Partners Elizabeth Houssemayne Du Boulay