Ernst Wilhelm Adalbert Kuhn (7 February 1846, in Berlin – 21 August 1920, in Munich) was a German Indologist and Indo-Europeanist. He was the son of philologist Adalbert Kuhn.
He studied at the universities of Berlin and Tübingen, receiving his doctorate in 1869 with a dissertation-thesis on Kaccāyana, Kaccâyanappakaraṇae specimen. In 1871 he obtained his habilitation for Sanskrit and comparative grammar at the University of Halle, and during the following year relocated to Leipzig as a lecturer. In 1875 he became a full professor at the University of Heidelberg, and from 1877 to 1917 served as a professor of Aryan philology and comparative Indo-European linguistics at the University of Munich.
From 1873 he worked on the Zeitschrift für vergleichende Sprachforschung, a journal founded by his father, and since 1892 was an editor of Orientalische Bibliographie, a publication founded by August Müller in 1887. In 1883 he became a member of the Bavarian Academy of Sciences.
- Ueber die sprache der Etrusker (with Wilhelm Paul Corssen; 2 volumes, 1874–75) – On the language of the Etruscans.
- Beiträge zur Pali-grammatik, 1875 – Contributions to Pali grammar / considered to be his best work.
- Mythologische studien von Adalbert Kuhn (1886, as editor) – Mythological studies of Adalbert Kuhn.
- Barlaam und Joasaph; eine bibliographisch-literargeschichtliche Studie, 1894 – Barlaam and Josaphat; a bibliographical-literary-historical study / In this work Kuhn pointed out the Buddhist influence on Christian legends.
- Grundriss der iranischen philologie (as editor; main author Wilhelm Geiger) – Outline of Iranian philology.