The HENNESSY surname in the USA

Frequency Comparisons
	Total	Rank	Frequency %	Per million people
United States
United States (Current snapshot)	9,187	3550	0.003	34
United States (1880 census)	2,681	2276	0.005	54
Change since 1880	+6506	-1274	-0.002	-20
Other Countries
Australia	2,044	792	0.013	125
United Kingdom	2,879	2155	0.006	63

Top States for HENNESSY by Total
State	Total	Rank in State	Frequency %	Per million people
New York	1,147	1568	0.006	60
California	836	3542	0.002	25
Florida	686	2948	0.004	43
Massachusetts	642	1394	0.010	101
Pennsylvania	604	2476	0.005	49
Top States for HENNESSY by Frequency
State	Total	Rank in State	Frequency %	Per million people
Massachusetts	642	1394	0.010	101
North Dakota	55	1748	0.009	86
New Hampshire	88	2160	0.007	71
New Jersey	593	1498	0.007	70
Delaware	54	2559	0.007	69

Notes

Total is the total number of people with that surname.
Rank is the position in the list of names ordered by total (eg, a rank of 1 means that it's the most common name, and a rank of 10 means it's the tenth most common, etc).
Frequency is the percentage of people with that surname.
Per million people is the number of people with that surname per million of the population.

'A figure of zero indicates that we don't have data for this name (usually because it's quite uncommon and our stats don't go down that far). It doesn't mean that there's no-one with that name at all!

For less common surnames, the figures get progressively less reliable the fewer holders of that name there are. This data is aggregated from several public lists, and some stats are interpolated from known values. The margin of error is well over 100% at the rarest end of the table!

For less common surnames, the frequency and "per million" values may be 0 even though there are people with that name. That's because they represent less than one in a million of the population, which ends up as 0 after rounding.

It's possible for a surname to gain in rank and/or total while being less common per million people (or vice versa) as there are now more surnames in the USA as a result of immigration. In mathematical terms, the tail has got longer, with a far larger number of less common surnames.

Figures for top states show firstly the states where most people called HENNESSY live. This obviously tends to be biased towards the most populous states. The second set of figures show where people called HENNESSY represent the biggest proportion of the population. So, in this case, there are more people called HENNESSY in New York than any other state, but you are more likely to find a HENNESSY by picking someone at random in Massachusetts than anywhere else.

Classification and Origin of HENNESSY

Region of origin: British Isles

Country of origin: Ireland

Language of origin: Gaelic

Ethnic origin: Celtic

Religious origin: Christian

Data for religion and/or language relates to the culture in which the HENNESSY surname originated. It does not necessarily have any correlation with the language spoken, or religion practised, by the majority of current American citizens with that name.

Data for ethnic origin relates to the region and country in which the HENNESSY surname originated. It does not necessarily have any correlation with the ethnicity of the majority of current American citizens with that name.

Ethnic distribution of HENNESSY in the USA

Classification	Total	Percent
White (Hispanic)	129	1.4
Mixed Race	119	1.3
Black/African American	45	0.49
Asian/Pacific	44	0.48
Native American/Alaskan	17	0.19
White (Caucasian)	8,833	96.15

Ethnic distribution data shows the number and percentage of people with the HENNESSY surname who reported their ethnic background as being in these broad categories in the most recent national census.

Similar names to HENNESSY

The following names have similar spellings or pronunciations as HENNESSY.

This does not necessarily imply a direct relationship between the names, but may indicate names that could be mistaken for this one when written down or misheard.