Rudy de Mérode, real name Frédéric Martin (1905 in Silly-sur-Nied, Moselle – ?, probably in Spain) was a French collaborator during the German occupation of France in the Second World War.
In July 1940, de Mérode returned to Paris and set himself up at German military intelligence's HQ in the Hôtel Lutetia.
De Mérode's speciality was bank convoys, of money gathered from different sources or in the form of gold, jewels, art objects or ingots.
With the aid of the DSK (Devisenschutzkommando) he opened bank vaults, buying gold and silver objects from their owners at a debased price or, if they refused to cooperate, having them deported.
At first setting himself up in Saint-Jean-de-Luz, in mid 1945 he was initially to be found in San Sebastián before reaching Madrid, where he called himself "the prince de Mérode".