House of Saxe-Coburg and Gotha

The House of Saxe-Coburg and Gotha ( ; 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.

Founded in 1826 by Ernest Anton, the sixth duke of Saxe-Coburg-Saalfeld, it is a cadet branch of the SaxonHouse of Wettin. An agnatic branch of the family currently reigns in Belgium (the descendants of Leopold I). In Belgium, due to similar resentment against Germany after the Great War, the use of the name was also changed in 1920 by King Albert I to "de Belgique" (French), "van België" (Dutch) or "von Belgien" (German), meaning "of Belgium". However, the "Saxe-Coburg" house name of the Belgian royal family was never officially abolished, and since relations between Belgium and Germany have been normalized for a long time, the use of this family name has been slowly reintroduced since the 2010s (especially since King Philippe of Belgium wants to limit the number of princes and princesses of Belgium, and thus the use of the designation "of Belgium", to only a select group of his family).