Explore the Family Name Delap

The meaning of Delap

Irish: 1. variant of Dunlop. 2. shortened Anglicized form of Ó Lapáin ‘descendant of Lapán’, see Lappin.

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

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

Based on the Decennial U.S. Census, the popularity of the surname Delap has seen a slight decrease and increase in different aspects from 2000 to 2010. In 2000, Delap was ranked 21,565th, but it dropped to the 22,056th spot by 2010, marking a 2.28% decrease in rank. However, the count, or number of times the surname is registered, increased by 4.17%, going from 1,128 in 2000 to 1,175 in 2010. This indicates that while the name became less popular compared to other surnames, more people bore the name in 2010 than in 2000. The proportion per 100,000 individuals also declined slightly by -4.76%.

	2000	2010	Change
Rank	#21,565	#22,056	-2.28%
Count	1,128	1,175	4.17%
Proportion per 100k	0.42	0.4	-4.76%

Race and Ethnicity of people with the last name Delap

In terms of ethnic identity associated with the surname Delap, the Decennial U.S. Census data reveals some changes between 2000 and 2010. The majority of people with this surname identified as White in both years, although there was a slight 2.01% decrease in this group over the decade. The percentage of those identifying as Black slightly increased by 3.76%, while the representation of those identifying with two or more races saw a significant increase of 33.13%. Interestingly, the percentage of people with this surname who identify as Hispanic rose from zero in 2000 to 1.53% in 2010. Data for those identifying as Asian/Pacific Islander was suppressed for 2010, whereas the American Indian and Alaskan Native category remained at zero for both years.

	2000	2010	Change
White	94.5%	92.6%	-2.01%
Black	2.13%	2.21%	3.76%
Two or More Races	1.6%	2.13%	33.13%
Hispanic	0%	1.53%	0%
Asian/Pacific Islander	0.98%	0%	0%
American Indian and Alaskan Native	0%	0%	0%