Poseidon - Etymology

Etymology

The earliest attested occurrence of the name, written in Linear B, is Po-se-da-o or Po-se-da-wo-ne, which correspond to Poseidaōn and Poseidawonos in Mycenean Greek; in Homeric Greek it appears as Ποσειδάων (Poseidaōn); in Aeolic as Ποτειδάων (Poteidaōn); and in Doric as Ποτειδάν (Poteidan), Ποτειδάων (Poteidaōn), and Ποτειδᾶς (Poteidas). A common epithet of Poseidon is Γαιήοχος Gaiēochos, "Earth-shaker," an epithet which is also identified in Linear B tablets.

The origins of the name "Poseidon" are unclear. One theory breaks it down into an element meaning "husband" or "lord" (Greek πόσις (posis), from PIE *pótis) and another element meaning "earth" (δᾶ (da), Doric for γῆ (gē)), producing something like lord or spouse of Da, i.e. of the earth; this would link him with Demeter, "Earth-mother." Walter Burkert finds that "the second element da- remains hopelessly ambiguous" and finds a "husband of Earth" reading "quite impossible to prove."

Another theory interprets the second element as related to the word *δᾶϝον dâwon, "water"; this would make *Posei-dawōn into the master of waters. There is also the possibility that the word has Pre-Greek origin. Plato in his dialogue Cratylus gives two alternative etymologies: either the sea restrained Poseidon when walking as a foot-bond (ποσί-δεσμον), or he knew many things (πολλά εἰδότος or πολλά εἰδῶν).