Taranis or Taranus has again been styled the Celtic Jupiter; and inscriptions have been found "Jovi Taranuco" and "Deo Taranucno."  Of his position in the celestial group there can be no doubt; and with one conception of the classical Jupiter he certainly coincides, but not with the original or proper conception, as his name is simply the Welsh Taran or Irish Torunn "thunder."  He carried a long hammer as his emblem, and was, like Thor, the Thunder-god, the god of foul weather, whose worship would arise in natural parallelism with that of the Sun-god, the god of fine weather.  "Jupiter Taranucus" would thus correspond exactly to the Jupiter Fulgur Fulmen of another inscription and the Greek Ζεῦς Κεραυνός. (Foundations of England, Ramsay, 1898)