Prince Ferdinand Georg August of Saxe-Coburg and Gotha was a German prince of the House of Saxe-Coburg and Gotha and a general of cavalry in the Austrian Imperial and Royal Army during the Napoleonic Wars. Initially remaining a Lutheran until 1818, by marriage he established the Catholic branch of the family, which eventually gained the thrones of Portugal (1837) and Bulgaria (1887).

The House of Saxe-Coburg and Gotha is a European royal house. 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.