Tiwaz (Luwian deity) Tiwaz (Luwian deity) Tiwaz (Stem: Tiwad-) was the Luwian Sun-god. He was among the most important gods of the Luwians. The name of the Proto-Anatolian Sun god can be reconstructed as "*Diuod-", which derives from the Proto-Indo-European word "*dei-" ("shine", "glow"). This name is cognate with the Greek Zeus, Latin Jupiter, and Norse Tyr. While Tiwaz (and the related Palaic god Tiyaz) retained a promenant role in the pantheon, the Hittite cognate deity, was largely eclipsed by the Sun goddess of Arinna, becoming a god of the day, especially the day of death. In Luwian cuneiform of the Bronze Age,
Reo (deity) inscription, part of which reads , usually interpreted as "and ("or" thereafter) a fertile(?) bull for Reue" with the epithet lost. "Reue" therefore also seems to be a dative in the Lusitanian form of the name. "Reue" appears again on the Ribeira da Venda inscription, including an epithet, as - this time the deity is receiving a sacrifice of ten sheep. K T Witczak derives the name from earlier "*diewo", suggesting that the Lusitanian language changed the Proto-Indo European "d" to "r", making Reo a sky deity similar to (and having a name cognate with) the Greek Zeus and Roman