Yamaguchi Family History
Yamaguchi Name Meaning
Japanese: from a very common placename. The meaning as now written is 山口 ‘mountain entrance’ but originally the full meaning was ‘entrance to the mountain forest’ (yamabayashi no iriguchi). The surname occurs most frequently in western Japan. Listed in the Shinsen shōjiroku.
Source: Dictionary of American Family Names 2nd edition, 2022