Surname 吉森 (Yoshimori 
, 吉森 , Gison 
) , around the globe, is quite a rare family name. The cognomen 吉森 is characteristic of Philippines, where it is a rare surname, Italy, and United Arab Emirates. Measured by absolute frequency, it most frequently occurs in Philippines, China, and Italy. More prevalently, 吉森 is the forename as well as the last name.