Here's three more:
1 Daniel Malcolm, whom the Americans call a 'true son of liberty', who defied British rule and its revenue act. His grave, in Boston, Massachusetts, is of particular note. The tomb was chipped by British musketballs in the American War of Independence. Legend has it that British soldiers would read his epitaph, spit on his grave and then fire at his gravestone for luck in battle. (Sorry, I know that was his surname but thought you might be interested any way)
2 Sir (Henry) Malcolm Sargent, English conductor, composer, pianist and organist. b. 29 April, 1895. d. 3 October, 1967. The Malcolm Sargent cancer fund was set up in his memory.
3 Bloke on the Vicks sinus spray advert in the 1970s. He had a cold, and said he couldn't do his exams. Mum, after telling him to use the nasal spray, said: 'Course you can, Malcolm'. A catchphrase through the 70s.