Hennessey: Name Popularity, History & Rankings (1880

By decade. Change compares yearly averages, so the current partial decade is on equal footing. Best rank is the name's best yearly rank within the decade.

Decade	Girls	Per year	Change	Best rank
1880s	–	–	–	–
1890s	–	–	–	–
1900s	–	–	–	–
1910s	–	–	–	–
1920s	–	–	–	–
1930s	–	–	–	–
1940s	–	–	–	–
1950s	–	–	–	–
1960s	–	–	–	–
1970s	–	–	–	–
1980s	–	–	–	–
1990s	46	5	–	#5,892
2000s	153	15	+233%	#5,967
2010s	133	13	-13%	#5,037
2020s (to 2025)	51	9	-36%	#7,781

Decade

Girls

Per year

Change

Best rank

1880s

–

1890s

–

1900s

–

1910s

–

1920s

–

1930s

–

1940s

–

1950s

–

1960s

–

1970s

–

1980s

–

1990s

–

#5,892

2000s

153

+233%

#5,967

2010s

133

-13%

#5,037

2020s (to 2025)

-36%

#7,781

The story of Hennessey

Hennessey is not currently in use for newborns in the United States: fewer than five babies received the name in 2025. Its story lives in the historical record below.

Since 1992, 383 American babies have been named Hennessey. Its peak came in 2015, when 27 newborns received the name, the signature sound of the 2010s.

The chart above shows the full history: the popularity view (births per 1,000 babies) is the honest comparison across generations, since total US births have changed enormously since 1880. Switch to the rank view to see where Hennessey stood among all girls' names in any year, or use the compare tool to plot it against other names.

How old are people named Hennessey?

The median living Hennessey is about 16 years old; half are between 9 and 22. An estimated 400 people named Hennessey are alive in the United States today.

Estimated from births per year and Social Security period life tables; an approximation of the living age distribution, by age in years.

Hennessey year by year

Every year since 2001, and five-year steps back to 1880. Rank is within each sex.

Year	Girls	Girls rank
2025	–	–
2024	5	#16,188
2023	11	#9,227
2022	9	#10,694
2021	14	#7,781
2020	12	#8,603
2019	11	#9,344
2018	7	#12,970
2017	12	#8,984
2016	15	#7,746
2015	27	#5,037
2014	12	#9,186
2013	12	#9,235
2012	11	#9,964
2011	13	#8,819
2010	13	#8,903
2009	23	#5,967
2008	14	#8,677
2007	13	#9,195
2006	14	#8,414
2005	15	#7,651
2004	19	#6,324
2003	14	#7,729
2002	14	#7,563
2001	16	#6,733
2000	11	#8,785
1995	–	–
1990	–	–
1985	–	–
1980	–	–
1975	–	–
1970	–	–
1965	–	–
1960	–	–
1955	–	–
1950	–	–
1945	–	–
1940	–	–
1935	–	–
1930	–	–
1925	–	–
1920	–	–
1915	–	–
1910	–	–
1905	–	–
1900	–	–
1895	–	–
1890	–	–
1885	–	–
1880	–	–

Frequently asked questions

Quick answers about Hennessey, drawn from the same Social Security data as the charts above.

How old is the average Hennessey?

The median living Hennessey is about 16 years old. Half of all living Hennesseys are between 9 and 22 years old.

How many people named Hennessey are alive today?

An estimated 400 people named Hennessey are alive in the United States, based on 383 recorded births and Social Security life tables.

How popular is the name Hennessey in 2025?

Hennessey did not appear in the 2025 Social Security data, which means fewer than five babies received the name that year.

How many people are named Hennessey?

383 babies have been named Hennessey in the United States since 1992, based on Social Security card applications.

When was the name Hennessey most popular?

Hennessey peaked in 2015, when 27 newborns received the name.

Is Hennessey a boy or girl name?

Hennessey is overwhelmingly a girl's name: 100% of babies with the name.

Is the name Hennessey rising or falling?

Hennessey is declining, less popular now than a decade ago.

Hennessey

Hennessey popularity over time

The story of Hennessey

How old are people named Hennessey?

Hennessey year by year

Frequently asked questions

Names like Hennessey