Doi Family History
Doi Name Meaning
Japanese: usually written 土井 ‘earthen well’. It is found mainly in western Japan and the island of Shikoku. A name with the same pronunciation but written 土居 ‘earthen habitation’ is found in eastern Japan. Both have an alternate pronunciation Tsuchii. Vietnamese (Đới): variant of Đái (from the Chinese surname 戴 see Dai ).
Source: Dictionary of American Family Names 2nd edition, 2022