Doi Family History
Doi Surname 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
