Explore the Family Name Guilfoil
The meaning of Guilfoil
Irish: variant of Guilfoyle.
Dictionary of American Family Names, 2nd edition, © Oxford University Press, 2022.
How common is the last name Guilfoil in the United States?
According to data from the Decennial U.S. Census, the surname Guilfoil saw a decrease in popularity between 2000 and 2010. The rank of the surname fell from 45735 in 2000 to 51723 in 2010, representing a decline of 13.09 percent. Similarly, the count of individuals with the Guilfoil surname also dropped from 440 in 2000 to 402 in 2010, marking an 8.64 percent decrease. The proportion of the surname per 100,000 people decreased by 12.5 percent from 0.16 to 0.14.
| 2000 | 2010 | Change | |
|---|---|---|---|
| Rank | #45,735 | #51,723 | -13.09% |
| Count | 440 | 402 | -8.64% |
| Proportion per 100k | 0.16 | 0.14 | -12.5% |
Race and Ethnicity of people with the last name Guilfoil
The Ethnicity data from the Decennial U.S. Census reveals some changes in ethnic identity among those bearing the Guilfoil surname. In 2000, 97.05 percent identified as White, but this figure fell to 94.28 percent by 2010. Meanwhile, there was a significant rise in the percentage of people identifying as Hispanic, from 1.59 percent in 2000 to 3.23 percent in 2010, a change of 103.14 percent. The number of individuals reporting two or more races also emerged in the 2010 data at 1.24 percent. However, there were no individuals who identified as Asian/Pacific Islander, Black, or American Indian and Alaskan Native in either census year.
| 2000 | 2010 | Change | |
|---|---|---|---|
| White | 97.05% | 94.28% | -2.85% |
| Hispanic | 1.59% | 3.23% | 103.14% |
| Two or More Races | 0% | 1.24% | 0% |
| Asian/Pacific Islander | 0% | 0% | 0% |
| Black | 0% | 0% | 0% |
| American Indian and Alaskan Native | 0% | 0% | 0% |