Page "Comparative method" Paragraph 12

In publications of 1647 and 1654, Marcus van Boxhorn first described a rigid methodology for historical linguistic comparisons and proposed the existence of an Indo-European proto-language ( which he called " Scythian ") unrelated to Hebrew, but ancestral to Germanic, Greek, Romance, Persian, Sanskrit, Slavic, Celtic and Baltic languages.

The Scythian theory was further developed by Andreas Jäger ( 1686 ) and William Wotton ( 1713 ), who made first forays to reconstruct this primitive common language.