Étienne Paul Marie Lamotte (French pronunciation: [etjɛn pɔl maʁi lamɔt]; 21 November 1903 – 5 May 1983) was a Belgian priest and Professor of Greek at the Catholic University of Louvain, but was better known as an Indologist and the greatest authority on Buddhism in the West in his time.
[citation needed] He studied under his pioneering compatriot Louis de La Vallée-Poussin and was one of the few scholars familiar with all the main Buddhist languages: Pali, Sanskrit, Chinese and Tibetan.
He is also known for his French translation of the Mahāprajñāpāramitāupadeśa (Chinese: 大智度論, English: Treatise on the Great Perfection of Wisdom), a text attributed to Nāgārjuna.
Lamotte thought that the text was most likely composed by an Indian bhikkhu from the Sarvastivada tradition, who later became a convert to Mahayana Buddhism.
They are vast encyclopedias of references and primary source materials from half a dozen languages which he seems to handle with complete familiarity.