Boris III of Bulgaria
Simeon Borisov von Saxe-Coburg-Gotha (, "Simeon Borisov Sakskoburggotski", ; born 16 June 1937) is a Bulgarian politician, last heir to the throne of the Kingdom of Bulgaria, who had never served as reigning Tsar of Bulgaria due to his minor age at the time his father Boris III of Bulgaria died (1943) and the monarchy in Bulgaria has been abolished (1946). Later Simeon has served as Prime Minister of Republic of Bulgaria from 2001 to 2005.