Mommsen, Hist. of Rome, i. 482 ff.
According to Schwegler, Röm. Gesch., i. 354-383, Εὔανδρος is simply Greek for Faunus = Favinus, "the benevolent" or "good" god. Cf. Fauna = Bona Dea.
"Rapi ... similatur virgo ex gremio matris ... cum ad virum trahitur, quod videlicet ea res feliciter Romulo cessit."—Festus, s.v. rapi.
E.g., among the Esthonians, Finns, Wotjaks, Mordwins, Vedic Hindoos, and Bohemians.
For the use of the sword, axe, or dagger to keep off evil spirits from a wedding, see Schroeder, Hochzeitsbräuche der Ester, 99-102.