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House of Saxe-Coburg and Gotha

European royal house of German origin

The House of Saxe-Coburg and Gotha ( SAKS KOH-bərg ... GOT(H)-ə; German: Haus Sachsen-Coburg und Gotha), known until 1826 as the House of Saxe-Coburg-Saalfeld (Haus Sachsen-Coburg-Saalfeld), is a European royal house of German origin. It takes its name from its oldest domain, the Ernestine duchy of Saxe-Coburg and Gotha, and its members later sat on the thrones of Belgium, Bulgaria, Portugal, and the United Kingdom and its dominions. The British branch was officially renamed to House of Windsor by British king George V in 1917, during the First World War, amid anti-German sentiment.

From Wikipedia (CC BY-SA). Not a dictionary word, so it lives in Other Names.