Why is the ninth month called September?
Old English wandrian "move about aimlessly, wander," from West Germanic *wandrojan (cf. Old Frisian wondria, Middle Low German, Middle Dutch wanderen, German wandern "to wander," a variant form of the root represented in Old High German wantalon "to walk, wander"), from root *wend- "to turn" (see wind (v.)). In reference to the mind, affections, etc., attested from c.1400. Related: Wandered; wandering. The Wandering Jew of Christian legend first mentioned 13c. (cf. French le juif errant, German der ewige Jude).
wandering wan·der·ing (wŏn'dər-ĭng)
Moving about freely; not fixed; abnormally motile.
of the Israelites in the wilderness in consequence of their rebellious fears to enter the Promised Land (Num. 14:26-35). They wandered for forty years before they were permitted to cross the Jordan (Josh. 4:19; 5:6). The record of these wanderings is given in Num. 33:1-49. Many of the stations at which they camped cannot now be identified. Questions of an intricate nature have been discussed regarding the "Wanderings," but it is enough for us to take the sacred narrative as it stands, and rest assured that "He led them forth by the right way" (Ps. 107:1-7, 33-35). (See WILDERNESS.)