Maria of Vianden

Maria of Vianden (1337–1400) was the posthumous daughter and heiress of Count Henry II, who was killed at Famagusta in Cyprus in September 1337; she inherited Vianden as an infant.

Her mother, Marie of Namur, married again around 1340, and in 1348 (or in 1346) Maria was married to Simon III, Count of Sponheim-Kreuznach, who ruled Vianden in her right and from 1357 also held other Luxembourg fiefs. Simon was taken prisoner in 1371 and freed after several years and a heavy ransom.

Her son Walram died in 1382 and her daughter Maria in 1373; her surviving daughter Elisabeth, twice widowed and childless, surrendered Vianden in 1417 to Engelbert I of Nassau-Dillenburg.