Casey Hennessey

Name meaning, origin and global statistics

Casey Hennessey — Celtic
45K People worldwide
United States Most common in
1970s Peak popularity
Gender
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Casey Hennessey is a name that combines Celtic origins. The first name Casey is a feminine given name of Celtic origin. Casey is a given name, originally derived from the Irish Gaelic cathasaigh, meaning "vigilant" or "watchful". It can be used as a nickname for the name Cassandra or the initials K.C. It is in use for girls or boys in both the United States, the United Kingdom and other English-speaking countries. It has ranked among the 1,000 most used names for American boys between 1900 and 1919 and again from 1942 to 2022. It was the 336th most popular name for boys born in the United States in 2022. The surname Hennessey: Hennessey is an Irish surname, being the anglicised form of Ó hAonghusa. Families of this name were found in Kingdom of Uí Failghe and Kingdom of Desmond. People with the surname Brad Hennessey (born 1980), baseball player Charlotte Hennessey (1873–1928), Canadian actress; mother of Mary Pickford (Gladys Louise Smith), Lottie Pickford and Jack Pickford Dan Hennessey (1942–2024), American-Canadian voice actor Dorothy Hennessey (1913–2008), Roman Catholic religious sister and activist Gwen Hennessey (born 1932), Roman Catholic religious sister and activist John Hennessey, founder of Hennessey Pe. Casey is a distinctive first name, carried by approximately 45K people globally, with the highest concentration in United States. The name Casey reached peak popularity in the 1970s, reflecting the naming trends of that era.

Etymology & Origin

First Name: Casey

Celtic

Casey is a given name, originally derived from the Irish Gaelic cathasaigh, meaning "vigilant" or "watchful". It can be used as a nickname for the name Cassandra or the initials K.C. It is in use for girls or boys in both the United States, the United Kingdom and other English-speaking countries. It has ranked among the 1,000 most used names for American boys between 1900 and 1919 and again from 1942 to 2022. It was the 336th most popular name for boys born in the United States in 2022.

Surname: Hennessey

Irish

Hennessey is an Irish surname, being the anglicised form of Ó hAonghusa. Families of this name were found in Kingdom of Uí Failghe and Kingdom of Desmond. People with the surname Brad Hennessey (born 1980), baseball player Charlotte Hennessey (1873–1928), Canadian actress; mother of Mary Pickford (Gladys Louise Smith), Lottie Pickford and Jack Pickford Dan Hennessey (1942–2024), American-Canadian voice actor Dorothy Hennessey (1913–2008), Roman Catholic religious sister and activist Gwen Hennessey (born 1932), Roman Catholic religious sister and activist John Hennessey, founder of Hennessey Pe.

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Geographic Distribution

The first name Casey is distributed across the globe, with the highest concentrations in the following countries:

United States 52%
United Kingdom 27%
Australia 12%
Canada 9%

Popularity Over Time

Popularity of the name Casey by decade, based on birth registration data:

1900s
1910s
1920s
1930s
1940s
1950s
1960s
1970s
1980s
1990s
2000s
2010s
2020s
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Notable People Named Casey Hennessey

People listed above share this name. Listed for informational purposes only. Source: Wikipedia.

Numerology

According to Pythagorean numerology, each letter in a name carries a numerical value. Here are the key numbers for Casey Hennessey:

5
Expression Number

Freedom and adaptability. A dynamic, versatile personality that embraces change and seeks new experiences.

3
Soul Urge Number

Creativity and self-expression. Associated with artistic flair, optimism and sociability — a natural communicator.

11
Personality Number

Intuition and inspiration (Master Number 11). Amplifies spiritual awareness, creative vision and sensitivity.

Numerology is a cultural tradition for exploring symbolism in names. Results are for entertainment purposes.

Frequently Asked Questions

What is the origin of the first name Casey?
The first name Casey originates from Celtic. Casey is a given name, originally derived from the Irish Gaelic cathasaigh, meaning "vigilant" or "watchful". It can be used as a nickname for the name Cassandra or the initials K.C. It is in use for girls or boys in both the United States, the United Kingdom and other English-speaking countries. It has ranked among the 1,000 most used names for American boys between 1900 and 1919 and again from 1942 to 2022. It was the 336th most popular name for boys born in the United States in 2022.
When was Casey most popular?
The name Casey reached its peak popularity during the 1970s.
What is the origin of the surname Hennessey?
The surname Hennessey originates from Irish. Hennessey is an Irish surname, being the anglicised form of Ó hAonghusa. Families of this name were found in Kingdom of Uí Failghe and Kingdom of Desmond. People with the surname Brad Hennessey (born 1980), baseball player Charlotte Hennessey (1873–1928), Canadian actress; mother of Mary Pickford (Gladys Louise Smith), Lottie Pickford and Jack Pickford Dan Hennessey (1942–2024), American-Canadian voice actor Dorothy Hennessey (1913–2008), Roman Catholic religious sister and activist Gwen Hennessey (born 1932), Roman Catholic religious sister and activist John Hennessey, founder of Hennessey Pe.
What are the origins of the name Casey Hennessey?
The name Casey Hennessey combines two different traditions: the first name Casey has Celtic roots, while the surname Hennessey originates from Irish.
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