Marmaduke Blennerhassett

Marmaduke Blennerhassett may refer to:


 * Sir Marmaduke Charles Henry Joseph Blennerhassett, 6th Baronet (1902–1940) of the Blennerhassett Baronets
 * Sir (Marmaduke) Adrian Francis William Blennerhassett, 7th Baronet (1940–2022) of the Blennerhassett Baronets