Nevinson Blennerhassett de Courcy (1789-1845) (1789–1845) Parents Michael de Courcy Anne Blennerhassett Children William Blennerhassett de Courcy Nevinson Willoughby de Courcy John Sinclair Bremer de Courcy Sir Michael de Courcy Siblings Anne de Courcy Michael de Courcy Partners Mary Blennerhassett