William Parnell Parnell [later Parnell-Hayes], William (c.1780–1821), political author (1780–1821) Parents Laetitia Charlotte Brooke Sir John Parnell, 2nd Baronet Children Catherine Parnell John Parnell Siblings Henry Parnell, 1st Baron Congleton Sophia Parnell Sir John Augustus Parnell, 3rd Bt. Partners Frances Howard