Kustantajan sarjaLeiden Indo-European Etymological Dictionary
- Old Frisian Etymological Dictionary (Leiden Indo-European Etymological Dictionary) (tekijä: Dirk Boutkan)
- Etymological Dictionary of the Iranian Verb (Leiden Indo-European Etymological Dictionary Series) (tekijä: Johnny Cheung)
- The Origin of the Indo-Iranians (tekijä: Kuz'mina)
- Etymological Dictionary of Proto-Celtic (Leiden Indo-European Etymological Dictionary Series) (tekijä: Ranko Matasović)
- Etymological Dictionary of Greek (Leiden Indo-European Etymological Dictionary Series, Vol. 10) (English and Greek Edition) (tekijä: Robert Beekes)