Cognomen Siddhaarth (Siddhaarth 
) , all over the world, is an extremely rare last name. The cognomen Siddhaarth is characteristic of Southern Asia, particularly India, where it is an extremely rare surname. More prevalently, Siddhaarth is the forename as well as the last name.
Ab, Rajkumar, Kumanesan, Bhardwaj, Sivasamy, Malhotra, Seebauluck, Saraogi, Oberoi, Nandal, Tandon, Gautam, Gandhi, Pandey, Kannan, Sriram, Sudhir, Sharma, Shah, Bala, Babu, Jain, Iyer, Sheth, Madabushi, Sethi, Lulla, Jalan, Nanda, Verma, Mishra, Saxena, Gupta, and Sivashanmugam