Explore the Family Name Mcwilliam
The meaning of Mcwilliam
Scottish and Irish: Anglicized form of Gaelic Mac Uilleim, a patronymic from a Gaelicized form of William, also Anglicized as Williamson in Scotland. The name is thought to be mainly Scottish in Ulster, though there has been some confusion with McQuillan in County Down. In Connacht, McWilliam was a branch of Burke. Some characteristic forenames: Scottish Iain, Morag.
Dictionary of American Family Names, 2nd edition, © Oxford University Press, 2022.
How common is the last name Mcwilliam in the United States?
Based on the Decennial U.S. Census data, the popularity of the surname Mcwilliam has seen a decline over the decade from 2000 to 2010. In 2000, this surname ranked 34,150th in popularity and decreased to a rank of 38,582 by 2010, reflecting a change of -12.98%. The count of individuals with the Mcwilliam surname also dropped from 628 in 2000 to 573 in 2010, marking an -8.76% decline. This decrease in popularity is further underlined by the proportion per 100k figure, which fell from 0.23 in 2000 to 0.19 in 2010, a -17.39% change.
| 2000 | 2010 | Change | |
|---|---|---|---|
| Rank | #34,150 | #38,582 | -12.98% |
| Count | 628 | 573 | -8.76% |
| Proportion per 100k | 0.23 | 0.19 | -17.39% |
Race and Ethnicity of people with the last name Mcwilliam
The Decennial U.S. Census data also provides insight into the ethnic identity associated with the surname Mcwilliam. There were no reported changes in individuals identifying as Asian/Pacific Islander or American Indian and Alaskan Native between 2000 and 2010. However, there was a noticeable increase in the percentage of those identifying as White, from 84.08% in 2000 to 86.21% in 2010. Similarly, the percentage of individuals identifying as Hispanic saw a growth of 15.18%, from 3.03% in 2000 to 3.49% in 2010. Interestingly, the Mcwilliam surname saw its first instances of individuals identifying with two or more races in 2010, registering at 1.40%. Conversely, the percentage of individuals identifying as Black decreased significantly from 12.10% in 2000 to 8.20% in 2010, a drop of -32.23%.
| 2000 | 2010 | Change | |
|---|---|---|---|
| White | 84.08% | 86.21% | 2.53% |
| Black | 12.1% | 8.2% | -32.23% |
| Hispanic | 3.03% | 3.49% | 15.18% |
| Two or More Races | 0% | 1.4% | 0% |
| Asian/Pacific Islander | 0% | 0% | 0% |
| American Indian and Alaskan Native | 0% | 0% | 0% |