Ferdinand de Géramb (14 January 1772 – 15 March 1848) was an Ungro-French supposed nobleman, military officer, courtier, adventurer and later Trappist monk and religious author.
In 1808 he fell into the hands of Napoleon's forces, who imprisoned him in the Château de Vincennes until 1814, when the allied powers entered Paris.
In his monk's cowl the great nobleman was occasionally seen distributing alms to the poor, from the considerable sums of money he received from his family to "defray his expenses".
Brother de Géramb was the author of many works, the principal including: Other writings have an ascetical character and were often reprinted and translated.
On his entry into the religious life, he put the surviving children into the care of his brother, Léopold de Géramb, having placed them under the protection of the Russian Tsar and the Emperor of Austria.