Thor closely resembles other Indo-European deities associated with the thunder: the Celtic Taranis,[REF][REF] the Baltic Perkūnas, the Slavic Perun,[REF] and particularly the Hindu Indra, whose red hair and thunderbolt weapon the vajra are obvious parallels.
In Georges Dumézil's trifunctional hypothesis of Indo-European religion, Thor represents the second function, that of strength.