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Wiedemanni F.J.

(Ferdinand Johann Wiedemann, 1805-1887)

Linguist of Swedish-German descent, the first to describe Estonian’s peculiar opposition of three phonological quantities (for more details, ask a native, they probably won’t be able to explain either); compiler of various dictionaries (e.g. Ehstnisch-deutsches Wörterbuch (1869), Estonian-German dictionary) and grammars of northern coastal Estonian, Võru, Livonian, Syjranisch (aka Siranian, Sirenian, Sirjenic, Syrjenic also written Zirianian, a perhaps now extinct Finnish dialect of the Vologda Oblast, Russia)... Street (in Kadriorg) known until 1923 as Lutheri under various guises (Lutri, Lutre, Luteri, Lutherstraße and Лютерская ул.) after Alexander Martin Luther, mayor of Tallinn (1848-1864) and founder of the Lutheri Vabrik on Lutheri (see this for more details) in Veerenni, Johannes Aavik lived for a while at No.6, see Aaviku.