Eugène Auguste Albert de Rochas d'Aiglun (20 May 1837 – 2 September 1914) was a French parapsychologist, historian, translator, writer, military engineer and administrator.

He studied literature and mathematics at the Lycée de Grenoble, then, in 1857, entered the École Polytechnique in Paris, intending to follow a military career.

As a scholar, he made significant contributions to the study of military engineering history, producing, for example, a French translation of an 11th-century Alexandrian treatise on fortification and machines of war called Veterum Mathematicorum Opera (1693), and publishing the correspondence of the distinguished 17th century military engineer, Vauban.

Rochas was part of the committee that investigated the famous Italian medium, Eusapia Palladino, detailed in his book, L'extériorisation de la motricité (1896).

[8][9] He investigated other "magnetic" phenomena such as the transference of disease from one organism to another,[10] past life regression, the effects of music on human emotion (see Les Sentiments, la musique et le geste), etc.