Frederik Herman Henri (Frits) Kortlandt (born June 19, 1946, Utrecht) is a professor of descriptive and comparative linguistics at Leiden University in the Netherlands. He writes on Baltic and Slavic languages, the Indo-European languages in general, and Proto-Indo-European, though he has also published studies of languages in other language families. He has also studied ways to associate language families into super-groups such as Indo-Uralic.
Kortlandt holds five degrees from the University of Amsterdam:
- B.A., 1967, Slavic Linguistics and Literature
- B.A., 1967, mathematics and economics
- M.A., 1969, Slavic linguistics
- M.A., 1970, mathematical economics
- Ph.D., 1972, mathematical linguistics
Kortlandt has been a member of the Royal Dutch Academy of Sciences since 1986 and is a 1997 Spinozapremie laureate. In 2007, he composed a version of Schleicher's fable, a story written in a hypothetical, reconstructed Proto-Indo-European, which differs radically from all previous versions.