In the entire world, Shashak (Shashak 
) is quite a rare masculine first name. The forename Shashak is habitual in Southern Asia, particularly India, where it is a very rare boy's name. Very seldom, Shashak is the last name as well as the forename.
Sah, Sharma, Shukla, Pathak, Ranjan, Thakur, Tivari, Saksena, Saurabh, Shekhar, Mishra, Agraval, Rastogi, Dikshit, Jaiswal, Kulkarni, Pramanik, Tripathi, Upadhyay, Chaursiya, Maheshvari, Rathaur, Yadav, Verma, Nayak, Raj, Rai, Dev, Jha, Mani, Sahu, Dhar, Garg, Jain, Vera, Malik, Sahoo, Singh, Sinha, Suman, Barik, Kumar, Rawat, Gupta, Goyal, Tyagi, Shrivastav, and Bhaganagare