Frederik Kortlandt

Frederik Herman Henri "Frits" Kortlandt (born 19 June 1946) is a Dutch former 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 the controversial Indo-Uralic. Provided by Wikipedia