Note 1269 — Chapter XXI · DIANUS AND DIANA
Reading edition
This theory of the derivation of janua from Janus was suggested, though not accepted, by Ph. Butmann (Mythologus, ii. 79 sqq.). It occurred to me independently. Mr. A. B. Cook also derives janua from Janus, but he would explain the derivation in a different way by supposing that the lintel and two side-posts of a door represented a triple Janus. See his article “Zeus, Jupiter, and the Oak,” Classical Review, xviii. (1904) p. 369.