Ernst Wilhelm Oskar Windisch (4 September 1844, Dresden – 30 October 1918, Leipzig) was a German classical philologist and comparative linguist who specialised in Sanskrit, Celtic and Indo-European studies.
In the meantime, he completed his habilitation in Sanskrit and comparative linguistics at the university (1869).
In 1877 he returned to his alma mater in Leipzig as a professor of Sanskrit and director of the Indo-Europeanist institute.
Among his students were Friedrich Delitzsch as well as Anna Leonowens who attended his Sanskrit lectures from 1897 to 1901.
[1] In the same year, Windisch published his translation of the Old Irish epic Táin Bó Cúailnge into German.