Explore the Family Name Gwilliam
The meaning of Gwilliam
Welsh (Pembrokeshire and western England): from the Welsh personal name Gwillym, a form of Old French Guillaume (see Gilliam and William).
Dictionary of American Family Names, 2nd edition, © Oxford University Press, 2022.
How common is the last name Gwilliam in the United States?
Based on data from the Decennial U.S. Census, the popularity of the surname Gwilliam has increased significantly from 2000 to 2010. The rank of this surname moved from 48,380 in 2000 to 41,657 in 2010 showing an increase of around 13.9%. The count of people having this surname also rose from 410 to 522 during this period, marking a substantial growth of 27.32%. In terms of proportion per 100k, it went up by 20% from 0.15 to 0.18.
| 2000 | 2010 | Change | |
|---|---|---|---|
| Rank | #48,380 | #41,657 | 13.9% |
| Count | 410 | 522 | 27.32% |
| Proportion per 100k | 0.15 | 0.18 | 20% |
Race and Ethnicity of people with the last name Gwilliam
Discussing the ethnicity associated with the surname Gwilliam based on the data from the Decennial U.S. Census, it is evident that the majority identify as White. This group made up 96.59% of those with the surname in 2000, and even though it slightly declined, the percentage remained high at 94.44% in 2010. The Hispanic representation also grew from 3.41% in 2000 to 4.41% in 2010, recording an increase of 29.33%. However, for other ethnic identities such as Asian/Pacific Islander, Two or more races, Black, and American Indian and Alaskan Native, the census data was either suppressed for privacy or showed no individuals identified under these categories in both years.
| 2000 | 2010 | Change | |
|---|---|---|---|
| White | 96.59% | 94.44% | -2.23% |
| Hispanic | 3.41% | 4.41% | 29.33% |
| 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% |