Of Pre-Greek origin, possibly Semitic (Phoenician for "man from the east,"), from Proto-Semitic *q-d-m (“to precede, come before”), with influence from κέκασμαι (kékasmai, “I have excelled, shined”). Compare Classical Syriac ܩܕܡ (“to come before”), Arabic قدم, Hebrew קדם.
- Κάδμος in Liddell & Scott (1940) A Greek–English Lexicon, Oxford: Clarendon Press
- Κάδμος in Liddell & Scott (1889) An Intermediate Greek–English Lexicon, New York: Harper & Brothers
- Κάδμος in Autenrieth, Georg (1891) A Homeric Dictionary for Schools and Colleges, New York: Harper and Brothers
- Κάδμος in Slater, William J. (1969) Lexicon to Pindar, Berlin: Walter de Gruyter
- Woodhouse, S. C. (1910) English–Greek Dictionary: A Vocabulary of the Attic Language, London: Routledge & Kegan Paul Limited, page 1,004
- Roberts, Edward A. (2014) A Comprehensive Etymological Dictionary of the Spanish Language with Families of Words based on Indo-European Roots, Xlibris Corporation, →ISBN