In all the world, Kumagaya (Kumagaya , Кумагаи ) is an extremely rare unknown gender first name. Much more prevalently, Kumagaya is the last name as well as the forename.
Kumadani, Kumagai, Kumakai, Kumatani, Kumaya, Kumazawa, くまがい, and クマガヤ
Kaho, Asuka, Kazumi, Toshimi, Christen, Kazunori, Kazuhisa, Yasutaka, and Christine
, Кумагаи 
) is an extremely rare unknown gender first name. Much more prevalently, Kumagaya is the last name as well as the forename.