Complex sentence: Among them was, in particular, Jacques-François-Fromental-Élie Halévy who shortly afterwards was appointed principal horn in the royal and imperial court orchestras and permanent soloist of chamber music by King Louis Philippe.
Split into simpler sentences: Among them was, in particular, Jacques-François-Fromental-Élie Halévy. Shortly after that he was appointed principal horn in the royal and imperial court orchestras and permanent soloist of chamber music by King Louis Philippe.