Kayci: 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".
Kayci is a both name that means "This name derives from the Middle Irish Gaelic genitive form “Cathasaig,” meaning “vigilant, watchful,” from the surname “Ó Cathasaig". Its Irish (Gaelic) origins reflect deep cultural values and traditions that have been passed down through generations. Parents choosing this name often appreciate its profound significance and timeless appeal.
Quick Facts About Kayci
Quick facts about Kayci
Origin
Irish (Gaelic)
Gender
Unisex
Popularity
Moderately popular
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 Kayci
Kayci is pronounced /ˈkeɪ.si/
Step-by-step pronunciation guide:
Break it into syllables: Kay-ci
Say it like: "KAY-CI"
Practice saying it naturally a few times
✓Pronunciation verified by linguistic sources
Usage & Popularity
Kayci is predominantly used in english speaking communities, where it maintains strong cultural connections and traditional significance.
english
Frequently Asked Questions About Kayci
What does the name Kayci mean?
Kayci 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 Kayci 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. While not the most common choice, Kayci's meaningful roots have given it staying power among parents looking for a name with substance.
What is the origin of the name Kayci?
Kayci 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 Kayci a boy or girl name?
Kayci 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. Kayci 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, Kayci 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 Kayci?
Kayci is pronounced "/ˈkeɪ.si/". This pronunciation follows ga language patterns. As a single-syllable name, Kayci is quick to say and easy to call out. If you're unfamiliar with irish (gaelic) names, listening to a native speaker say Kayci can help you catch the right rhythm and emphasis.
How popular is the name Kayci?
Kayci is somewhat common, familiar to most people. With moderate popularity, Kayci offers familiarity without being everywhere. It's the kind of name people recognize but don't hear every day. Kayci'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, Kayci holds its own, appealing to parents who value distinctive options.
Where is the name Kayci commonly used?
Kayci is used primarily in english naming traditions. Though irish (gaelic) in origin, Kayci 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 Kayci into their naming traditions. A child named Kayci 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, Kayci 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.