Explore the Family Name Cosmos

The meaning of Cosmos

American shortened (and altered) form of Greek patronymics derived from the personal name Kosmas, such as Kosmopoulos.

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

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

Based on the Decennial U.S. Census data, the popularity of the surname Cosmos showed a decline between 2000 and 2010. In 2000, Cosmos ranked 74,164th in popularity with a count of 243 individuals carrying this last name, representing 0.09 per 100,000 of the population. By 2010, the rank fell to 86,645 with only 215 individuals recorded with the Cosmos surname, reducing its representation to 0.07 per 100,000. This change marks an overall decrease of 16.83% in rank and 11.52% in count over the ten-year period.

	2000	2010	Change
Rank	#74,164	#86,645	-16.83%
Count	243	215	-11.52%
Proportion per 100k	0.09	0.07	-22.22%

Race and Ethnicity of people with the last name Cosmos

The ethnic identity associated with the Cosmos surname also underwent some changes from 2000 to 2010, according to the Decennial U.S. Census. In 2000, the overwhelming majority of those with the Cosmos surname identified as White, at 91.77%. By 2010, while still predominant, the proportion of White individuals with this surname dropped slightly to 86.98%, representing a 5.22% shift. The ten-year period also saw increases in other ethnicities. The Hispanic population with the Cosmos surname rose from 2.88% to 5.12%, marking a significant 77.78% increase. Furthermore, new entries in the ethnic mix were seen in 2010 with 2.79% identifying as two or more races and 4.65% identifying as Black. Asian/Pacific Islander and American Indian and Alaskan Native populations with the Cosmos surname remained at 0 during both census years.

	2000	2010	Change
White	91.77%	86.98%	-5.22%
Hispanic	2.88%	5.12%	77.78%
Black	0%	4.65%	0%
Two or More Races	0%	2.79%	0%
Asian/Pacific Islander	0%	0%	0%
American Indian and Alaskan Native	0%	0%	0%