How Many People Are Named Denis Oconnell?

There are approximately 2 people named Denis Oconnell living in the United States today. That makes this name combination very rare, occurring at a rate of about 1 in 171,377,169 Americans.

This estimate combines SSA birth records for the first name Denis with Census Bureau frequency data for the surname Oconnell. Below you will find a breakdown of both names, including popularity trends, gender data, and Census background data where it is available.

Estimated People with This Name

1 in 171,377,169 Americans

Combination Rarity

Very Rare

Very Rare Very Common

First Name

Denis

Last Name

Oconnell

Denis: Popularity Over Time

Year-by-year SSA birth registrations for the first name Denis. The peak year was 1952 with 625 births. The average person named Denis today is 53 years old.

Male

Female

Ancestry of the First Name Denis

In the 2020 Census, the first name Denis was most commonly recorded among people who identified as White (65.66%). The next largest recorded groups were Hispanic (25.59%) and Black (5.23%).

These percentages describe the people who had the first name Denis in the 2020 Census. They do not tell you the deeper origin or meaning of the name itself.

Read this as a snapshot of who already had the name in 2020, not as a trend line. The SSA chart above is still the better way to see how Denis rose or fell over time.

White

65.66%

Black

5.23%

Hispanic

25.59%

Asian/Pacific Islander

2.06%

American Indian/Alaska Native

0.22%

Two or More Races

1.24%

Ancestry of the Oconnell Surname

The surname Oconnell was most commonly recorded among people who identified as White in the 2020 Census.

This is a self-reported race and ethnicity breakdown for people who had the surname Oconnell in the published Census surname tables. It gives useful context around who was recorded with the name, but it does not tell the full family history of every Boone line.

White

92.55%

Black

0.43%

Hispanic

3.48%

Asian/Pacific Islander

0.88%

American Indian/Alaska Native

0.16%

Two or More Races

2.50%

How we calculated this

The first name "Denis" has an estimated frequency of < 0.0001% among living Americans, based on SSA birth records from 1880 to 2024 adjusted for mortality using CDC 2023 life tables.

The surname "Oconnell" appears at a rate of 11.65 per 100,000 people in the 2020 U.S. Census.

We do not use the Census first-name snapshot for the main estimate because it is only published once every 10 years. The latest public first-name Census file is from 2020, which is already 6 years old. SSA birth records plus CDC survival data give a better current estimate of how many people with the first name Denis are likely to be alive now.

Multiplying these frequencies against the U.S. population of ~343 million gives 2 estimated people. This assumes first names and last names are statistically independent. Full methodology.

Other people named Denis

Denis Smith Denis Johnson Denis Williams Denis Brown Denis Jones Denis Garcia Denis Leary

Other people with the surname Oconnell

Michael Oconnell James Oconnell John Oconnell David Oconnell Robert Oconnell William Oconnell George Oconnell Jack Oconnell

Denis Oconnell: Questions and Answers

How many people are named Denis Oconnell?

We estimate approximately 2 people named Denis Oconnell are alive in the United States today. The first name Denis is shared by 15,473 Americans, and the surname Oconnell is shared by 39,939.

How rare is the name Denis Oconnell?

This name combination is classified as Very Rare, occurring at a rate of about 1 in 171,377,169 Americans. The first name Denis is uncommon and the surname Oconnell is uncommon.

Is Denis a male or female name?

Denis is predominantly male, with 96.0% of bearers being male and 4.0% female. It peaked in popularity in 1952 and the average bearer today is 53 years old.

What does the Census say about the first name Denis?

In the 2020 Census, the first name Denis was most commonly recorded among people who identified as White (65.66%). The next largest recorded groups were Hispanic (25.59%) and Black (5.23%). These percentages describe the people who had the name in the 2020 Census, not the deeper origin of the name itself.

Where does this data come from?

First name data comes from the Social Security Administration (1880 to 2024), adjusted for survival using CDC 2023 life tables. When available, first-name Census background data comes from the 2020 U.S. Census Bureau first-name tables. Surname data comes from the 2020 U.S. Census Bureau. Full methodology.

Try another name