Across the world, Kumahara (Kumahara 
) is an extremely rare unknown gender first name. Much more prevalently, Kumahara is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Kumahara | New Zealand, Canada, Brazil, United States |
Mr, Koichi, Kleber, Rafael, Robson, Regina, Toshio, Tokuya, Tsuneo, Harumi, Hiromi, Yukimi, Masaaki, Seiichi, Alberto, Charles, Claudia, Katsumi, Keisaku, Roberto, Gustavo, Tatsuya, Kazumi, Masami, Masako, Yasuo, Ko, Ana, Mayu, Alan, Akio, Chie, Caio, Koji, Luiz, John, Takashi, Erik, Mauro, Sadao, Seiji, Akira, Karen, Renan, Naomi, Erica, Emico, Vania, Masao, and Takeshi