Kaci Name Meaning & Historical Trends

Kaci

Pronunciation: KAY-see

Meaning Vigilant; watchful Gender Girl
GIRLS RANK
#2,132
TREND
59
BOYS RANK
#7,411
TREND
796

Rank shows the name’s position among U.S. baby names for each gender in 2025. Trend shows how many places it rose or fell since 2024. Rank 1 is the most popular. Based on U.S. Social Security Administration (SSA) data. Peak and lowest years are based on the number of girls named Kaci in the available records.

Fun Facts About the Name Kaci

  • More than 10 thousand babies named Kaci: U.S. records list 10,183 babies given the name Kaci from 1880 through 2025. Even 174 boys received the name Kaci - about 1 boy for every 58 girls.

What Does the Name Kaci Mean?

Kaci is a respelled form of the name Casey, which is anglicized from Irish Gaelic. The source is the surname Ó Cathasaigh, which means "descendant of Cathasach." Cathasach is an old Irish personal name normally translated as "vigilant" or "watchful." The same personal name underlies the related surname Mac Cathasaigh. A few explanations connect the byname to the Irish word cath ("battle"), but the standard gloss for Cathasach is "watchful," and the exact formation of the old name is not entirely settled.

Kaci Name History & Origins

Casey began as an Irish surname, from the families called Ó Cathasaigh, who were associated mainly with Munster, and the Mac Cathasaigh families of the north. As English spread in Ireland, the Gaelic name was shortened and respelled as Casey. The surname was carried to the United States and other English-speaking countries by Irish emigrants, and from there it came into use as a first name, long used for men and increasingly for girls in the twentieth century.

Kaci is one of several feminine respellings that grew out of that given-name use, alongside Kacie and Kacey. The change is a matter of spelling rather than a separate derivation: the -i ending marks the name as a girl's form in American usage while keeping the pronunciation of Casey. Kaci therefore shares the origin of Casey and has no independent root of its own.

How Popular is the Name Kaci?

Kaci recorded its highest annual U.S. birth count in 1990. Its best rank was #611 in 1989.

U.S. name popularity from 1880-2025, based on SSA data. Rank shows how the name compares with other names - lower numbers mean greater popularity. Births shows how many babies received the name each year.

Name popularity over more than a century, based on Social Security Administration data. Gaps in the chart indicate years when the name does not appear in the published records.

Explore More Lists with Name Kaci

Most Popular Girl Names That Start with K

See List of Most Popular Girl Names Starting with K

Unique Short Girl Names That Start with K

Discover Popular Girl Names Starting with K

How the Name Kaci Shapes Your Personality and Life?

EXTREMES in fortune, health and spirituality. You are very versatile, idealistic and intuitive. You either enjoy great success or suffer abject misery. The solution is service to others. Use your leadership abilities for humanity and not for self-glorification. You are bold, independent, inquisitive and interested in research. You know what you want and why you want it.

You find the best contentment in life when you own your own home and provide well for your family and loved ones. You have a great sense of responsibility and duty. You are comforting, appreciative and affectionate. Your obligation in life is to hold justice and truth, and if you follow the Law, you can find the great happiness and satisfaction.

✦ Kaci's Deeper Meaning & Tips for Parents Discover Kaci's symbolic numbers and practical tips for choosing a name that complements your child's birth date.
Explore Insights & Tips

Name Search