Cognomen 正野 (Masano 
, 正野 
, Масано) , around the globe, is quite a rare surname. The family name 正野 is characteristic of Tanzania, where it is a rare surname, Malawi, and Italy. In absolute terms, this name is the most popular in Tanzania, Malawi, and Philippines. More prevalently, 正野 is the forename as well as the last name.