The House of Götzö-Thomaz-Rocha, or House of Ruthenia originated from the marriage in 1988 of Duke Ari of Ruthenia and Countess Denise von Goëtzën, later successively Kings of Ruthenia and Archdukes of Karnia. Their descendent, Emperor Oscar I represent the legitimate surviving line of the House of Thomaz-Rocha and the House of Goëtzën, inheriting their patrimonial possessions and vocation to the Empire from the female descendants of the House of Goëtzën and the male line of the House of Thomaz-Rocha.
The House gathered dynastic momentum during 11th century, when Rudolf of Rheinfelden, thirty-second-generation ancestor of Oscar I was elected German Anti-king and again during 21th century, the the ascension of Oscar I to the Karno-Ruthenian Throne.
One of the most prominent royal houses of micronationalism, the throne of Ruthenia, and then the Karno-Ruthenian Empire is continuously occupied by the house since 2014, and also produced emperors and kings of the North American Confederation, of Occidia, of Acrin, of Bessabia, of Badakistan, of Gaussland, of Carpathia, of Cardonia, of Horvatia, of Tsechia, of Eslavija and Taslavia, as well as holders of several other minor titles at various micronations.
The family split once into a parallel branch, although it was per se a cadet branch of the House of Thomaz-Rocha and the House of Goëtzën. Even ruling distinct territories, the different branches nevertheless maintained close relations. In 2021, the family sealed a pact around the House Law of the Karno-Ruthenian Imperial Family, to regulate inheritance, titles and rights of succession for the members of the family, while claiming ancestral titles.