Globally, Jamamoto (Jamamoto , Ямамото ) is an extremely rare unknown gender given name. Much more frequently, Jamamoto is the last name as well as the forename.
Yamamoto, ياماموتو, ヤマモト, 山下, 山元, and 山本
Marinalva
, Ямамото 
) is an extremely rare unknown gender given name. Much more frequently, Jamamoto is the last name as well as the forename.