The term Vishnu is from the Sanskrit root Jishnu 'Vishnum Jishnum Mahavishnum prabha Vishnum Maheswaram' Vishnu Sahasranama. Jishnum means 'supporting,supportive' As Vishnu is the Protector and supports the Universe,he is called Vishnu.
Though there are Bhairava Temples in the North indicating Shiva's association with Burning Ghats and there is the association of Varanasi, Benares with Burning Ghat, there seems to be no clear
Transcaucasia. Strabo wrote that “to the country of the Albanians belongs also the territory called Caspiane, which was named after the Caspian tribe(Kaswan, Kashyap Jat clans), as was also the sea; but the tribe has now disappeared”. Moreover, the Caspian Gate, which is the name of a region in Tehran province of Iran, is another possible piece of evidence that they migrated to the south of the se
There are Eight forms of Shiva Sahasranama, One Dasa Sahasranama(10,000 names),and a Rudra Trisati. There seems to be no Trisati for Shiva. The Rudra Trisati is from the Rudram. It is a different form of Sri Rudra recital.
Rudra,like other Gods,has Trisati too. What is surprising is that Shiva has Eight different sahasranamas(mentioned in the Anusashan parva of the Mahabharata) And Shiva has a Dasa Sahasranama as well! It is very to come by. Dasa ,hundred:Sahasra,1000;dasa sahasra is 10,000)