Erbprinz Wilhelm ‘Florentin’ Ludwig Karl zu Salm-Salm: b. 17.iii.1786 (Senones, Salm-Salm), d. 2.viii.1846 (Bockhold, Westphalia); oldest son of the reigning prince, Konstantin Alexander Joseph Prinz zu Salm-Salm (b. 22 November 1762, d. 25 February 1828) by his first wife Viktoria Filizitas Prinzessin zu Lowenstein-Wertheim-Rochefort (b. 2 Jan 1769, d. 29 Nov 1786); 21.vii.1810 married (Schloß Napoleonshohe, Kassel) Flaminia Freyin di Rossi (b. 21 July 1795 Ajaccio, Corsica, d. 20 December 1840; sister of Colonel Nicolo di Rossi, AdC to Jerome). 24.x.1813 promoted to Wesphalian Gen-Brigade. 1813 went into Dutch service. Upon his father’s death became 4th Furst zu Salm-Salm und Herr auf der Wasserburg Anholt. Salm-Salm lost its independents in 1810. He was seceded by his son Alfred Constantin as hereditary prince.
A side note: Nachdem Belgien am 4. Oktober 1830 die Unabhangigkeit von den Niederlande verkundet hatte, meldete Furst Konstantin seine Anwartschaft auf den belgischen Thron an, den dann aber Leopold Prinz von Sachsen-Coburg als Leopold I. einnahm.
His youngest son was a very interesting person - Serving in the armed forces of Prussia, the United States (general US CW), Mexico and France (dying at the Battle of Gravelotte).
Portraits of Felix Prinz zu Salm-Salm b. 25 Dec 1828, d. 18 Aug 1870, the battle of Gravelotte: