Explore the Family Name Diffley
The meaning of Diffley
Irish (Leitrim): shortened Anglicized form of Gaelic Ó Duibhghiolla ‘descendant of the black lad’. Some characteristic forenames: Irish Brendan.
Dictionary of American Family Names, 2nd edition, © Oxford University Press, 2022.
How common is the last name Diffley in the United States?
Based on the Decennial U.S. Census, the surname Diffley has seen a slight increase in popularity over a decade. In 2000, this surname was ranked at 40,690 with 506 individuals carrying it. By the year 2010, its rank had improved to 39,659, indicating a growth of 2.53% in its popularity. The number of people carrying the Diffley name also rose by nearly 10% during this period, from 506 to 554. Despite these shifts, the proportion per 100k remained steady at 0.19.
| 2000 | 2010 | Change | |
|---|---|---|---|
| Rank | #40,690 | #39,659 | 2.53% |
| Count | 506 | 554 | 9.49% |
| Proportion per 100k | 0.19 | 0.19 | 0% |
Race and Ethnicity of people with the last name Diffley
In terms of ethnic identity, the Decennial U.S. Census data reveals that the majority of individuals with the surname Diffley identify as White. This group comprised 97.63% of all Diffleys in 2000 and slightly decreased to 96.93% by 2010. The Hispanic identity within this surname saw a modest increase of 1.69% over the decade, rising from 1.78% in 2000 to 1.81% in 2010. There were no changes reported in the Asian/Pacific Islander, two or more races, Black, or American Indian and Alaskan Native categories. Please note that in some categories the data was suppressed for privacy.
| 2000 | 2010 | Change | |
|---|---|---|---|
| White | 97.63% | 96.93% | -0.72% |
| Hispanic | 1.78% | 1.81% | 1.69% |
| Asian/Pacific Islander | 0% | 0% | 0% |
| Two or More Races | 0% | 0% | 0% |
| Black | 0% | 0% | 0% |
| American Indian and Alaskan Native | 0% | 0% | 0% |