Explore the Family Name Dethlefsen
The meaning of Dethlefsen
Danish, North German, and North Frisian: variant of Detlefsen.
Dictionary of American Family Names, 2nd edition, © Oxford University Press, 2022.
How common is the last name Dethlefsen in the United States?
Based on the Decennial U.S. Census, the popularity of the surname Dethlefsen experienced a notable decrease from 2000 to 2010. In 2000, Dethlefsen was ranked as the 57,985th most popular surname, with 328 individuals bearing it. By 2010, the rank dropped to 67,519 and the count reduced to 292, marking a decline of 16.44% in rank and 10.98% in total count. Consequently, the proportion of people per 100,000 with this surname also fell by 16.67% during the same period.
| 2000 | 2010 | Change | |
|---|---|---|---|
| Rank | #57,985 | #67,519 | -16.44% |
| Count | 328 | 292 | -10.98% |
| Proportion per 100k | 0.12 | 0.1 | -16.67% |
Race and Ethnicity of people with the last name Dethlefsen
Regarding the ethnicity associated with the surname Dethlefsen, data from the Decennial U.S. Census shows a slight shift over the decade. In 2000, nearly all individuals with this last name identified as White (96.04%), with a small percentage identifying as having two or more ethnic identities (1.52%). By 2010, while the majority still identified as White (94.18%), there was a rise in those identifying as Asian/Pacific Islander (1.71%) and those claiming two or more ethnic identities (2.74%). The percentages for Hispanic, Black, and American Indian and Alaskan Native ethnic identities remained unchanged, with all three categories recording zero percent both in 2000 and 2010.
| 2000 | 2010 | Change | |
|---|---|---|---|
| White | 96.04% | 94.18% | -1.94% |
| Two or More Races | 1.52% | 2.74% | 80.26% |
| Asian/Pacific Islander | 0% | 1.71% | 0% |
| Hispanic | 0% | 0% | 0% |
| Black | 0% | 0% | 0% |
| American Indian and Alaskan Native | 0% | 0% | 0% |