Prince Louis of Battenberg – Wikipedia

Louis Alexander of Battenberg was born in Graz, Styria, on 24 May 1854, the eldest son of Prince Alexander of Hesse and by Rhine by his morganatic marriage to Countess Julia von Hauke.Because of his morganatic parentage, Louis did not inherit his father’s rank in the Grand Duchy of Hesse; and, from birth, his style of Illustrious Highness and title of Count of Battenberg instead derived from …

https://en.wikipedia.org/wiki/Prince_Louis_of_Battenberg