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PATTISAM is the weapon of Veerabhadra Swami whom was created by Lord Shiva to destroy DAKSHA's Yajna and it seems after accomplished the Task the Pattisam was placed in middle of Godavari River which is even today 's sacred place known as Pattiseema ! It's enroute to Polavaram from Rajahmundry by Boat !
Hence Our Surname PATTISAM derived from this weapon of Swami Veerabhadra !! That's why we are Saivites ! and our Pravara ÄNGIRASA-MAANDHAATA-KOUTSA" Three Rishis belong to ANGIRASA GANAM !!!
We are Velanaadu - Vaidiki or V V