A 2000 article by Pensabene et al. publishes a collection of inscribed archaic and Republican ceramic fragments discovered during excavations on the southwest of the Palatine. Mainly they are one or two letters long and not very interesting, except for the history of the alphabet, but one (p. 198) reads [---]IEVS + [---]. Could this be restored as DIEVS? i.e. the old nominative of the name for the sky(-god) which we know Latin inherited (e.g. nudius tertius).
Pensabene, Patrizio, et al. 2000. Ceramica graffita di età arcaica e repubblicana dall'area sud ovest del Palatino. Scienze dell'antichità. 10:162–247.