Cadet of a reigning German dynasty, Prince Rainer was the head of the House of Saxe-Coburg and Gotha-Koháry branch of the House of Wettin, heir in the female line of one of the oldest and wealthiest families of the Hungarian nobility.
A descendant of a reigning German dynasty, Prince Rainer was the head of the Saxe-Coburg and Gotha-Koháry branch of the Wettin House, heir in the female line of one of the oldest and wealthiest families of the Hungarian nobility.