William Mallinson may refer to:William Mallinson (auctioneer), involved with the Sugarman Gang Sir William Mallinson, 1st Baronet (1854–1936) of the Mallinson Baronets Sir William James Mallinson, 2nd Baronet (1879–1944) of the Mallinson Baronets Sir (William) Paul Mallinson, 3rd Baronet (1909–1989) of the Mallinson Baronets Sir William John Mallinson, 4th Baronet (1942–1995) of the Mallinson Baronets Sir (William) James Mallinson, 5th Baronet of the Mallinson Baronets