Explore the Family Name Doi
The meaning of Doi
1. 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. 2. Vietnamese (Đới): variant of Đái (from the Chinese surname 戴, see Dai 1). Some characteristic forenames: Japanese Isamu, Shinobu, Daisuke, Kiyoshi, Masami, Masaru, Norio, Toshi, Tsuneo, Yuriko, Yutaka, Akira.
Dictionary of American Family Names, 2nd edition, © Oxford University Press, 2022.
How common is the last name Doi in the United States?
Based on the Decennial U.S. Census data, the popularity of the surname Doi has seen a decline between 2000 and 2010. In 2000, Doi ranked as the 17,268th most common surname in the United States, but by 2010 it dropped to the 20,996th position, marking a decrease of 21.59%. The number of individuals carrying the Doi surname also fell during this period from 1,509 to 1,253, a drop of almost 17%.
| 2000 | 2010 | Change | |
|---|---|---|---|
| Rank | #17,268 | #20,996 | -21.59% |
| Count | 1,509 | 1,253 | -16.96% |
| Proportion per 100k | 0.56 | 0.42 | -25% |
Race and Ethnicity of people with the last name Doi
When looking at the ethnicity associated with the Doi surname, the Decennial U.S. Census data shows that the majority identify as Asian/Pacific Islander, with 79.32% in 2000 decreasing slightly to 76.94% in 2010. Over the same time frame, there was a significant increase in the percentage of people with the surname Doi identifying with two or more races, jumping from 6.63% to 10.61%. While the proportion of those identifying as White saw a small rise of 3.09%, the Hispanic group saw a decrease of 24.56%. Interestingly, the 2010 data marked the first appearance of Black and American Indian and Alaskan Native ethnic identities with the Doi surname, though these groups remain small at 1.28% and 0.00% respectively.
| 2000 | 2010 | Change | |
|---|---|---|---|
| Asian/Pacific Islander | 79.32% | 76.94% | -3% |
| Two or More Races | 6.63% | 10.61% | 60.03% |
| White | 8.75% | 9.02% | 3.09% |
| Hispanic | 2.85% | 2.15% | -24.56% |
| Black | 0% | 1.28% | 0% |
| American Indian and Alaskan Native | 0% | 0% | 0% |