Mycroft may refer to: Fictional entities Mycroft Holmes, Sherlock Holmes' brother in Arthur Conan Doyle's detective novels Mycroft Holmes (novel), a 2015 novel by Kareem Abdul-Jabbar and Anna Waterhouse Mycroft Holmes, a computer in Robert A. Heinlein's 1966 novel The Moon Is a Harsh Mistress Mycroft Mixeudeim, main character in the play The Charge of the Expormidable Moose by Claude Gauvreau Computing Mycroft project, a collection of search plugins for web browsers Mycroft (software), an open source intelligent personal assistant inspired by Robert A. Heinlein's 1966 novel The Moon Is a Harsh Mistress People Alan Mycroft, co-creator of the Norcroft C compiler Frank Mycroft (1873–1900), an English cricketer who played for Derbyshire between 1893 and 1895 Michaela Mycroft (born 1994), South African activist Thomas Mycroft (1848–1911), English cricketer William Mycroft (1841–1894), English cricketer Ian Gillies (1927–2002), question setter and arbiter of the BBC Radio 4 quiz series Brain of Britain See also Mycroft Next, a character from Jasper Fforde's Thursday Next series of books Mycroft & Moran, an imprint of Arkham House publishers