Kasi

Unisex
Pronunciation:/ˈkeɪ.si/

Kasi: a unisex name of Irish (Gaelic) origin meaning "This name derives from the Middle Irish Gaelic genitive form “Cathasaig,” meaning “vigilant, watchful,” from the surname “Ó Cathasaig". It derives from the Irish (Gaelic) word "Cathasaig > CATHASACH".

In Irish (Gaelic) tradition, Kasi holds special significance as a both name representing This name derives from the Middle Irish Gaelic genitive form “Cathasaig,” meaning “vigilant, watchful,” from the surname “Ó Cathasaig. This name has been cherished across generations, carrying with it the wisdom and heritage of Irish (Gaelic) culture. Its enduring popularity speaks to its universal resonance.

Quick Facts About Kasi

Quick facts about Kasi
OriginIrish (Gaelic)
GenderUnisex
PopularityUncommon

Researched by Name Doctor Linguistics Team

Our names are verified by professional linguists with expertise in etymology and cultural naming traditions.

Last reviewed: November 2025

Meaning

This name derives from the Middle Irish Gaelic genitive form “Cathasaig,” meaning “vigilant, watchful,” from the surname “Ó Cathasaig.” In turn, the name means “descendant of Cathasach. The English version “Casey” was the 326th most popular name for boys born in the United States in 2007 and the 458th most popular name for girls. It ranked among the top 200 names for both sexes in the 1990s.

Etymology & Details

Name Root

Cathasaig > CATHASACH

How to Pronounce Kasi

Kasi is pronounced /ˈkeɪ.si/

Step-by-step pronunciation guide:

  1. Break it into syllables: Kas-i
  2. Say it like: "KAS-I"
  3. Practice saying it naturally a few times

Pronunciation verified by linguistic sources

Usage & Popularity

Kasi is predominantly used in english speaking communities, where it maintains strong cultural connections and traditional significance.

english
Frequently Asked Questions About Kasi
What does the name Kasi mean?
Kasi means "This name derives from the Middle Irish Gaelic genitive form “Cathasaig,” meaning “vigilant, watchful,” from the surname “Ó Cathasaig.” In turn, the name means “descendant of Cathasach. The English version “Casey” was the 326th most popular name for boys born in the United States in 2007 and the 458th most popular name for girls. It ranked among the top 200 names for both sexes in the 1990s.". The name comes from Cathasaig > CATHASACH. This irish (gaelic) name has been passed down through generations, carrying its meaning across different cultures and time periods. Parents who choose Kasi for children of any gender often connect with the name's meaning of "This name derives from the Middle Irish Gaelic genitive form “Cathasaig,” meaning “vigilant, watchful,” from the surname “Ó Cathasaig.” In turn, the name means “descendant of Cathasach. The English version “Casey” was the 326th most popular name for boys born in the United States in 2007 and the 458th most popular name for girls. It ranked among the top 200 names for both sexes in the 1990s." as a quality they hope to see in their child. Kasi offers a distinctive option for parents who want a name with clear meaning that stands apart from more common choices.
What is the origin of the name Kasi?
Kasi is a irish (gaelic) name. The name traces back to Cathasaig > CATHASACH. The name remains closely tied to english naming traditions while occasionally appearing in other cultures. The irish (gaelic) meaning "This name derives from the Middle Irish Gaelic genitive form “Cathasaig,” meaning “vigilant, watchful,” from the surname “Ó Cathasaig.” In turn, the name means “descendant of Cathasach. The English version “Casey” was the 326th most popular name for boys born in the United States in 2007 and the 458th most popular name for girls. It ranked among the top 200 names for both sexes in the 1990s." reflects values important in the culture where this name first appeared.
Is Kasi a boy or girl name?
Kasi is a unisex name, given to both boys and girls. Unisex names have grown more popular since the 1990s, with parents choosing them for flexibility and modern appeal. Kasi works equally well for any child, letting the person's identity shape how the name feels rather than the other way around. In irish (gaelic) tradition, Kasi has historically been given to children of either gender. The meaning "This name derives from the Middle Irish Gaelic genitive form “Cathasaig,” meaning “vigilant, watchful,” from the surname “Ó Cathasaig.” In turn, the name means “descendant of Cathasach. The English version “Casey” was the 326th most popular name for boys born in the United States in 2007 and the 458th most popular name for girls. It ranked among the top 200 names for both sexes in the 1990s." carries well for any child, giving the name lasting appeal.
How do you pronounce Kasi?
Kasi is pronounced "/ˈkeɪ.si/". This pronunciation follows ga language patterns. As a single-syllable name, Kasi is quick to say and easy to call out. If you're unfamiliar with irish (gaelic) names, listening to a native speaker say Kasi can help you catch the right rhythm and emphasis.
How popular is the name Kasi?
Kasi is less common but not rare. As a less common choice, Kasi gives a child a name that stands out. Most people will encounter it rarely, making it memorable when they do. Kasi's popularity may vary between irish (gaelic) communities and the broader population, where naming trends differ. The name's meaning of "This name derives from the Middle Irish Gaelic genitive form “Cathasaig,” meaning “vigilant, watchful,” from the surname “Ó Cathasaig.” In turn, the name means “descendant of Cathasach. The English version “Casey” was the 326th most popular name for boys born in the United States in 2007 and the 458th most popular name for girls. It ranked among the top 200 names for both sexes in the 1990s." likely influences its appeal, as parents often choose names that express values or hopes for their children. Among unisex names, Kasi holds its own, appealing to parents who value distinctive options.
Where is the name Kasi commonly used?
Kasi is used primarily in english naming traditions. Though irish (gaelic) in origin, Kasi found a home in other cultures where it resonated with local naming preferences. The meaning "This name derives from the Middle Irish Gaelic genitive form “Cathasaig,” meaning “vigilant, watchful,” from the surname “Ó Cathasaig.” In turn, the name means “descendant of Cathasach. The English version “Casey” was the 326th most popular name for boys born in the United States in 2007 and the 458th most popular name for girls. It ranked among the top 200 names for both sexes in the 1990s." carries universal appeal, helping explain why different cultures adopted Kasi into their naming traditions. A child named Kasi will likely find their name recognized in multiple countries, which can be an advantage for families with international connections or who value global accessibility. Across these cultures, Kasi is given to children of any gender, maintaining consistent gender association.

Sources: Etymology verified through linguistic research including Oxford Dictionary of First Names, Behind the Name, and academic etymology databases.

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