This is a family tree of the Kings of the Belgians, hereditary, constitutional monarchs of Belgium as defined by the Belgian Constitution.
See main article: House of Saxe-Coburg and Gotha.
Book: Pirenne, Henri. Henri Pirenne. Histoire de Belgique. VII: De la Révolution de 1830 à la Guerre de 1914. 2nd. fr. Maurice Lamertin. Brussels. 1948.