Explore the Family Name Moonan

The meaning of Moonan

Irish (Louth and Meath): Anglicized form of Gaelic Ó Maonáin ‘descendant of Maonán’, a byname based on a diminutive of maon ‘dumb’.

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

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

Based on the Decennial U.S. Census, the surname Moonan has seen a slight decrease in popularity between 2000 and 2010. Ranked at 60,083 in 2000, it slipped to 62,531 by 2010, indicating a -4.07% change. However, the actual count of individuals with this surname increased from 314 to 320 during the same period, marking a 1.91% growth. The proportion of people named Moonan per 100,000 also decreased slightly from 0.12 to 0.11, or -8.33%.

20002010Change
Rank#60,083#62,531-4.07%
Count3143201.91%
Proportion per 100k0.120.11-8.33%

Race and Ethnicity of people with the last name Moonan

In terms of ethnicity, the data from the Decennial U.S. Census reveals that the majority of individuals with the surname Moonan identify as White, although there was a marginal decline from 93.31% in 2000 to 91.88% in 2010. There were also some shifts among other ethnic identities. Asian/Pacific Islanders represented 1.91% of Moonans in 2000, but this figure dropped to zero by 2010. The percentage identifying as having two or more races also decreased from 2.87% to 1.56%. Meanwhile, there was an emergence of Hispanic and Black identities within this group, which recorded no representation in 2000 but accounted for 1.88% and 3.44%, respectively, in 2010. The percentage of American Indian and Alaskan Native remained unchanged at zero.

20002010Change
White93.31%91.88%-1.53%
Black0%3.44%0%
Hispanic0%1.88%0%
Two or More Races2.87%1.56%-45.64%
Asian/Pacific Islander1.91%0%0%
American Indian and Alaskan Native0%0%0%