The House of Luxembourg or Luxembourg dynasty was a royal family of the Holy Roman Empire in the Late Middle Ages, whose members between 1308 and 1437 ruled as kings of Germany and Holy Roman emperors as well as kings of Bohemia, Hungary and Croatia. Their rule was twice interrupted by the rival House of Wittelsbach. The family takes its name from its ancestral county of Luxembourg which they continued to hold.

The House of Wittelsbach is a former Bavarian dynasty, with branches that have ruled over territories including the Electorate of Bavaria, the Electoral Palatinate, the Electorate of Cologne, Holland, Zeeland, Sweden, Denmark, Norway, Hungary, Bohemia, and Greece. Their ancestral lands of Bavaria and the Palatinate were prince-electorates, and the family had three of its members elected emperors and kings of the Holy Roman Empire. They ruled over the Kingdom of Bavaria which was created in 1805 and continued to exist until 1918.