John Blennerhassett (1715-1763) (1715–1763) Parents Jane Denny John Blennerhassett Children Arthur Blennerhassett Frances Blennerhassett John Blennerhassett Siblings Mary Blennerhassett Letitia Blennerhassett Arthur Blennerhassett Agnes Blennerhassett Arabella Blennerhassett Partners Frances Herbert Anne Crosbie