The Indo-European Etymological Dictionaries Online (IEDO) is a collection of dictionaries of the most important languages and linguistic branches of Indo-European. This reference source is suitable for historical and general linguists. Each of the entries is accompanied by grammatical information, etymological commentary, reconstructions and bibliographical information.

Overview of titles:

• Etymological Dictionary of the Armenian Inherited Lexicon Online
• Etymological Dictionary of the Baltic Inherited Lexicon Online
• Etymological Dictionary of Proto-Celtic Online
• Etymological Dictionary of Old Frisian Online
• Etymological Dictionary of Proto-Germanic Online
• Etymological Dictionary of Greek Online
• Etymological Dictionary of the Hittite Inherited Lexicon Online
• Etymological Dictionary of the Iranian Verb Online
• Etymological Dictionary of Latin Online
• Cuneiform Luvian Lexicon Online
• Reconstructing Proto-Nostratic Online
• Etymological Dictionary of the Slavic Inherited Lexicon Online
• Etymological Dictionary of Tocharian B Online
• Materials for an Etymological Database of North Lechitic Dialects Online
• Lithuanian Etymological Dictionary Online