Explore the Family Name Guillou
The meaning of Guillou
French: from a pet form of the personal name Guillaume ‘William’, derived from its short form Guille 2.
Dictionary of American Family Names, 2nd edition, © Oxford University Press, 2022.
How common is the last name Guillou in the United States?
According to data from the Decennial U.S. Census, the popularity of the surname Guillou has increased between 2000 and 2010. In 2000, Guillou was ranked 144,908 in terms of popularity, while in 2010 it moved up to rank 140,157, marking a positive change of 3.28 percent. The count of individuals with the Guillou surname also grew, rising from 105 in 2000 to 119 in 2010 - a notable increase of 13.33 percent. However, the proportion per 100,000 people remained stable at 0.04.
| 2000 | 2010 | Change | |
|---|---|---|---|
| Rank | #144,908 | #140,157 | 3.28% |
| Count | 105 | 119 | 13.33% |
| Proportion per 100k | 0.04 | 0.04 | 0% |
Race and Ethnicity of people with the last name Guillou
The ethnic identity of those bearing the Guillou surname also shifted during this period according to the Decennial U.S. Census. Notably, there was a significant increase in the percentage of Black individuals with this surname, from 4.76 percent in 2000 to 12.61 percent in 2010, marking an impressive increase of 164.92 percent. There was a slight decrease in the percentage of White individuals from 84.76 percent to 80.67 percent. People reporting two or more races who carried the Guillou surname dropped by 26.44 percent from 5.71 percent to 4.20 percent. No changes were noted in Asian/Pacific Islander, Hispanic, American Indian and Alaskan Native categories, as these remained at zero.
| 2000 | 2010 | Change | |
|---|---|---|---|
| White | 84.76% | 80.67% | -4.83% |
| Black | 4.76% | 12.61% | 164.92% |
| Two or More Races | 5.71% | 4.2% | -26.44% |
| Asian/Pacific Islander | 0% | 0% | 0% |
| Hispanic | 0% | 0% | 0% |
| American Indian and Alaskan Native | 0% | 0% | 0% |