House of Saxe-Coburg and Gotha
The House of Saxe-Coburg and Gotha-Koháry is a Catholic cadet branch of the House of Saxe-Coburg and Gotha. It was founded with the marriage of Prince Ferdinand of Saxe-Coburg and Gotha, second son of Francis, Duke of Saxe-Coburg-Saalfeld, with Princess Maria Antonia Koháry de Csábrág. Their second son Prince August inherited the estates of the House of Koháry in Hungary and Austria. August's youngest son became Ferdinand I of Bulgaria.