Explore the Family Name Guglielmi

The meaning of Guglielmi

Italian: patronymic or plural form of the personal name Guglielmo. Some characteristic forenames: Italian Cosmo, Mario, Egidio, Gino, Alessandra, Alfredo, Amadeo, Amedeo, Antonio, Carlo, Carmine, Dante, Domenic, Domenico, Elena, Manuela, Marina, Roberto, Sergio.

Dictionary of American Family Names, 2nd edition, © Oxford University Press, 2022.

How common is the last name Guglielmi in the United States?

Based on the Decennial U.S. Census data, the surname Guglielmi has experienced a slight increase in popularity between 2000 and 2010. In 2000, it was ranked 29,390 in terms of prevalence, with a count of 758 individuals. By 2010, the rank moved up to 29,041 with an increase of 1.19 percent, seeing the count rise to 817 individuals, which corresponds to a growth of 7.78%. Despite these changes, the proportion of people with the surname per 100,000 remained steady at 0.28.

	2000	2010	Change
Rank	#29,390	#29,041	1.19%
Count	758	817	7.78%
Proportion per 100k	0.28	0.28	0%

Race and Ethnicity of people with the last name Guglielmi

Regarding ethnic identity, the Decennial U.S. Census data indicates that individuals bearing the Guglielmi surname are predominantly of White ethnicity, accounting for 96.83% in 2000 and dropping slightly to 94.12% in 2010. The percentage of individuals identifying as Hispanic rose significantly from 2.11% in 2000 to 5.14% in 2010, marking a notable change of 143.6%. However, the group identifying as Asian/Pacific Islander declined from 0.79% in 2000 to null in 2010. No significant changes were recorded among those identifying as Black or American Indian and Alaskan Native, with the figures remaining negligible or suppressed for privacy reasons.

	2000	2010	Change
White	96.83%	94.12%	-2.8%
Hispanic	2.11%	5.14%	143.6%
Asian/Pacific Islander	0.79%	0%	0%
Two or More Races	0%	0%	0%
Black	0%	0%	0%
American Indian and Alaskan Native	0%	0%	0%