MallowbyNames

Kaileen

kay-LEEN · Of uncertain origin; likely a modern invented name combining sounds from names like Kayla and Eileen.

2025 rank (girls)
#4,265
Babies named in 2025
33
Peak popularity
2022
2025 frequency
1 in 48,705 girls
Usually for
Girls
Trend
Declining since 2022

Declining since 2022, #4,265 for girls today.

Popularity of Kaileen since 1976

Babies named Kaileen per year in U.S. Social Security records.

285583198020002020Most births 2022Girls
Data table (by decade)
DecadeGirls
1970s10
1980s71
1990s201
2000s193
2010s142
2020s250

Meaning & origin

Kaileen is a modern invented name that first appeared in U.S. records in 1976. Its popularity peaked in 2022 and has been declining since, consistent with many coined names that follow a quick rise and fall. The name is most common in California and Texas, reflecting a pattern where trendy names often gain traction in large, multicultural states. In 2025, it ranked 4,265, given to about 1 in 48,705 girls. Kaileen likely blends sounds from names like Kayla and Eileen, creating a melodic and feminine option that fits the contemporary preference for 'aiden' or 'leen' endings. While it lacks a long history or traditional meaning, its appeal lies in its modern, fresh feel.

Kaileen first appeared in U.S. records in 1976. It is a modern coinage, blending the popular phonetic elements of Kayla and Eileen. The name saw its highest rank in 2022 and has since declined in use, reflecting a typical pattern for trendy invented names.

Where Kaileen is most popular

Births per 100,000 girls by state, 2025. The lightest shade means too few recorded births.

Nicknames & variants

Nicknames: Kay, Leen, Kay-Kay

Variants: Kaileigh, Kayleen, Kaelyn

Sibling names for Kaileen

Names that share Kaileen's style, for a brother or sister.

A parent animal hugging its little one, the personalized name page

K is for Kaileen, our favorite little girl.

K is for Kaileen…”

In a Mallowby alphabet book, Kaileen's letter becomes Kaileen's page: hand-illustrated, printed hardcover or paperback, made just for them.

Make Kaileen's book

Books for siblings or grandkids? The second book is 15% off.

Questions parents ask

What does the name Kaileen mean?
Kaileen has no established meaning; it is likely a modern invented name.
How popular is Kaileen right now?
In 2025, Kaileen ranked 4,265, with approximately 1 in 48,705 girls given the name.
Is Kaileen a boy or girl name?
Kaileen is almost exclusively used for girls.