Derivational etymology. Starting from the usual (and correct) etymology derived νόστος from νέομαι (see νόστος / νέομαι), Eustathius (or his source) adds an intermediate stp between the etymon and the lemma, deriving νότος from νέομαι (see νότος / νέομαι), and uniting thereby the two derivatives by assuming that the one is the direct etymon of the other, in a derivational chain νέομαι → νότος → νόστος. This derivation relies on purely formal criteria (νόστος can be derived from νότος by the addition of one letter), which prevail over the semantic criteria—usually in Greek etymology, it is the other way round, semantics prevail over form. If taken seriously, it would imply that νόστος etymologically means "return home thanks to the νότος" (proper meaning) and was then used by extension for any return. The formulation in Comm. Il., vol. 1, p. 322 (see Parallels) is especially interesting, for Eustathius provides the etymology deriving νόστος from νέομαι, and then adds [the square brackets materialize his additions to his own text] this new etymology, suggesting he may have found it later on. This etymology is not found anywhere else