Globally, Ganzan (Ganzan 
) is a common boy's first name. The first name Ganzan is characteristic of Eastern Asia, particularly Japan, where it is quite a common male name. Very seldom, Ganzan is the last name as well as the forename.
Seo, Sekine, Son-Ko, Kaneko, Tanaka, Tamura, Narita, Nomura, Hirano, Hirata, Hirose, Yasuda, Yamada, Matsuda, Nishida, Noguchi, Hayashi, Yoshida, Murakami, Nakamura, Watanabe, Kobayashi, Suzuki, Sasaki, Mizuno, Matsui, Ito, Ono, Oda, Uno, Muto, Sato, Aoki, Kato, Kono, Goto, Takahashi, Noda, Yano, Ueno, Saito, Saeki, Honma, Inoue, Ikeda, Okada, Otani, Ogawa, Hori, and Yoshikawa