Family name Yamasawa (Yamasawa 
) , throughout the world, is a very rare last name. The cognomen Yamasawa is characteristic of Canada, where it is a very rare surname, the United Kingdom, where it is an extremely rare surname, and the United States.
Mr, Ippu, Iwao, Yoko, Yuji, Masao, Sanzo, Sadao, Saeko, Shiho, Shuji, Shobu, Shoji, Shozo, Seiji, Seizo, Arata, Akira, Chika, Bryan, Bunyu, Kazuo, Ichi, Ikuo, Eiyu, Eiji, Ms, Ko, To, Ei, Yo, Man, Sam, Ken, Kyu, Ryo, Kachi, Gou, Mami, Akio, Aiko, Kaho, Kozo, Kowa, Koji, Dana, Jill, Toru, Nao, and Kaoru