Ernst, Prince of Leiningen was a German nobleman who served with distinction in the British Royal Navy.

Karl, Prince of Leiningen, KG was the third Prince of Leiningen and maternal half-brother of Queen Victoria. Leiningen served as a Bavarian lieutenant general, before he briefly played an important role in German politics as the first Prime Minister of the Provisorische Zentralgewalt government formed by the Frankfurt Parliament in 1848.