Other members of the family became kings of Belgium and Bulgaria, and married into nearly all of the other royal families of Europe. More than 50 years after Bulgaria became a republic, King Simeon returned to Bulgaria and was elected Prime Minister. After the First World War the Kings of Belgium stopped using the name Saxe-Coburg and Gotha, but never officially changed their name. Simeon of Bulgaria's legal name is Simeon Borisov Sakskoburggotski