Explore the Family Name Delannoy

The meaning of Delannoy

French (northern), Walloon, and Flemish: habitational name, with fused preposition de ‘from’, denoting someone from Lannoy, the name of several places in the north of France (Nord, Oise) and in Belgium. See also Delano and Delanoy.

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

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

Based on the Decennial U.S. Census data, the surname Delannoy has seen some changes in its popularity from 2000 to 2010. In 2000, it was ranked 93,841 in terms of commonality amongst surnames in the United States, but by 2010 it had moved up to 87,335, indicating a 6.93% increase in rank. There was also a rise in the total count of individuals with this surname, with the number growing from 181 to 213, which is a 17.68% increase. However, when measured as a proportion per 100,000 people, the prevalence of this surname remained steady at 0.07.

	2000	2010	Change
Rank	#93,841	#87,335	6.93%
Count	181	213	17.68%
Proportion per 100k	0.07	0.07	0%

Race and Ethnicity of people with the last name Delannoy

The Decennial U.S. Census data also provides information regarding the ethnic identity associated with the surname Delannoy. The largest ethnic group identified with this name in both 2000 and 2010 were White, although the percentage did decrease slightly from 63.54% to 60.09%. The second-largest ethnicity was Hispanic, which increased from 30.39% to 35.21% over the decade. Meanwhile, the Black population with this surname dropped to zero in 2010 from 3.31% in 2000. No individuals with this surname identified as Asian/Pacific Islander, Two or more races, or American Indian and Alaskan Native during these two census periods.

	2000	2010	Change
White	63.54%	60.09%	-5.43%
Hispanic	30.39%	35.21%	15.86%
Asian/Pacific Islander	0%	0%	0%
Two or More Races	0%	0%	0%
Black	3.31%	0%	0%
American Indian and Alaskan Native	0%	0%	0%