Adolphe de Leuven was a French theatre director and a librettist. Also known as Grenvallet, and Count Adolph Ribbing.
He was the illegitimate son of Adolph Ribbing, who was involved in the assassination of Gustav III of Sweden in 1792, and... Wikipedia
Born: September 29, 1802, Paris, France
Died: April 14, 1884 (age 81 years), Marly-le-Roi, France
Books: I Quattro Fratelli; a Comic Opera, in Three Acts [and in Verse] ... The Libretto Adapted from the French ["Les Quatre Fils Aymon"] of MM. Leuven & Brunswick by M. Maggioni. Ital. & Eng, The New Comic Opera, in Three Acts, of the Castle of Aymon: Or, the Four Brothers ... Adapted from the French [“Les Quatre Fils Aymon”] of Leuven and Brunswick, Etc, and Yvonne
Parents: Adolph Ribbing