Throughout the world, Jansan (Jansan 
) is quite a common masculine forename. The given name Jansan is characteristic of Pakistan, where it is a rare boy's name, India, and Saudi Arabia, where it is a very rare male name. In absolute terms, it is commonest in India, Pakistan, and Indonesia. Much less frequently, Jansan is the last name as well as the forename.
Ng, Disoj, Lakra, Lugun, Topno, Nadar, Iqbal, Mathew, Maseeh, Bhatti, Pervez, Pierre, Rhoads, George, Joseph, Thomas, Iverson, Moradian, Shivhare, Varghese, Pitar, Mariyathas, Kumar, Surin, Hu, Mil, Sam, Pal, Raj, Rao, Das, Gul, Jan, Joy, Khan, Dara, Gull, Jaan, Jose, John, Maisi, Munda, Singh, Chako, and Sivalingam