Marnix may refer to:
People the medieval and early modern house of Marnix, whose name originates from an eponymous hamlet of Nattages in today’s France, e.g.:
(1537–1567), Lord of Toulouse, Flemish noble, rebel leader who died in the Battle of Oosterweel Philips of Marnix, Lord of Saint-Aldegonde (1540-1598), Flemish writer, statesman and adviser to William of Orange; probable author of the Dutch national anthem Wilhelmus Marnix Gijsen (1899–1984), Flemish writer Marnix Vincent (1936–2016), Belgian literary translator Marnix Kappers (1943–2016), Dutch cabaret artist and actor Marnix Lameire (born 1955), Belgian road cyclist Marnix Van Holsbeeck (born 1957), Belgian and American radiologist Marnix Vervinck (born 1959), Belgian Olympic archer Marnix van Rij (born 1960), Dutch CDA politician Marnix Verhegghe (born 1961), Belgian hammer thrower Marnix ten Kortenaar (born 1970), Dutch-Austrian speed skater Marnix Lippmann (born 1974), Bassist Marnix Smit (born 1975), Dutch footballer Marnix Kolder (born 1981), Dutch footballer
Other uses Castle Marnix de Sainte-Aldegonde, the residence of the Marnix family in Bornem, Antwerp, Belgium HNLMS Marnix, a school ship of the Royal Netherlands navy Marnix Gymnasium, in Rotterdam, Netherlands 5002 Marnix (1987 SS3), a main-belt asteroid
See also Marnick Vermijl (born 1992), Belgian footballer Marnicq Bervoets (born 1969), Belgian motocross racer