Surname 斯涵 (Sihan 
, 斯涵 ) , in all the world, is a widespread cognomen. The family name 斯涵 is characteristic of India, where it is quite a common surname, Taiwan, where it is quite a rare surname, and Sri Lanka. In absolute terms, it is the most numerous in India, Bangladesh, and Taiwan. Much less frequently, 斯涵 is the forename as well as the last name.