Explore the Family Name Trefethen
The meaning of Trefethen
Altered form of Cornish Trevethan.
Dictionary of American Family Names, 2nd edition, © Oxford University Press, 2022.
How common is the last name Trefethen in the United States?
Based on the Decennial U.S. Census data, Trefethen saw a slight decrease in popularity as a surname from 2000 to 2010. The surname ranked 36,129th in 2000 and slipped to the 38,050th position by 2010, indicating a -5.32% change. Similarly, the count of individuals carrying this surname also fell slightly from 586 in 2000 to 583 in 2010, marking a -0.51% change. Consequently, the proportion of this surname per 100,000 people dropped by -9.09%.
| 2000 | 2010 | Change | |
|---|---|---|---|
| Rank | #36,129 | #38,050 | -5.32% |
| Count | 586 | 583 | -0.51% |
| Proportion per 100k | 0.22 | 0.2 | -9.09% |
Race and Ethnicity of people with the last name Trefethen
Looking at the ethnic identity associated with the Trefethen surname, based on the Decennial U.S. Census, it's predominantly linked to the White ethnicity. In 2000, about 95.90% of the Trefethens identified as White, and this percentage inched up to 96.05% by 2010. There was a small representation of the Hispanic ethnicity within the Trefethen population, accounting for 2.56% in 2000 which slightly decreased to 2.40% in 2010. Interestingly, there was no recorded percentage for Asian/Pacific Islander, Black, or American Indian and Alaskan Native ethnicities in either year. However, by 2010, a new category appeared with 0.86% of Trefethens identifying with two or more races.
| 2000 | 2010 | Change | |
|---|---|---|---|
| White | 95.9% | 96.05% | 0.16% |
| Hispanic | 2.56% | 2.4% | -6.25% |
| Two or More Races | 0% | 0.86% | 0% |
| Asian/Pacific Islander | 0% | 0% | 0% |
| Black | 0% | 0% | 0% |
| American Indian and Alaskan Native | 0% | 0% | 0% |