the Hittite god Tarhun (see also Teshub ) contain a comparable * torun- element. The Thracian deity names Zbel-thurdos, Zbel-Thiurdos also contain this element ( Thracian thurd(a), "push, crash down"). Others have different etymologies, e.g. * Perkwunos , Brontes , and Indra ." b)    http://www.celtnet.org.uk/gods_t/taran.html "Celtic, The Gaulish and Brythonic God