- Source: Geoffrey I of Vianden
Geoffrey I of Vianden 7th duke of Vianden (-1310) was a son to duke Filips I of Vianden and Mary of Brabant-Perwez.
He succeeded to his father in 1273 in Vianden. Geoffrey married Aleidis of Oudenaarde (1260-1305) and Lutgardis van Ligny and fathered:
Filips II of Vianden 8th duke of Vianden 1310-1315/1316
Lutgardis of Vianden, who married Jan van Sombreffe
Margareth (1280-1336), who married duke Henry II of Lodi (-1366).