NameCensus.
Rare

Kellyn

A feminine variant of Kelly, derived from Irish Gaelic meaning "bright-headed one".

Name Census estimates that about 2,131 living Americans carry the first name Kellyn. It appears on both sides of the gender split, with 90.0% of registrations being female. The average person named Kellyn today is around 26 years old, and the year with the single highest number of Kellyn births was 1985 (97 babies).

This page is the full Name Census profile for Kellyn. Below you will find a gender breakdown showing how the name splits between male and female registrations, a year-by-year popularity chart stretching back to 1880, decade-level totals, the top US states for this name, its meaning and etymology, and a set of frequently asked questions with data-backed answers.

People living today

2.1K

~ 1 in 160,842 Americans

Peak year

1985

97 babies that year

Average age

26

years old

2024 SSA rank

#6,775

Tracked since 1964

Gender

Gender distribution for Kellyn

Kellyn leans heavily female at 90.0% of total registrations, but 220 boys have also been registered with the name over the years, giving it a small but present crossover presence.

90% female
Male220 (10.0%)Female1,976 (90.0%)

Kellyn as a male name

  • Ranked #13,255 in 2024
  • 5 male births in 2024
  • Peak: 2013 (19 births)

Kellyn as a female name

  • Ranked #6,775 in 2024
  • 17 female births in 2024
  • Peak: 1985 (97 births)

Popularity

Kellyn: popularity over time

The SSA tracks Kellyn from the 1960s through to the 2020s, spanning 7 decades of birth certificate data. The biggest single decade for the name was the 1980s, with 597 total registrations. Usage has dropped considerably from its 1980s peak. The most recent decade brought in only a fraction of the registrations that the name once attracted.

Babies born per year

MaleFemale
024497397197019801990200020102020

Decades

Kellyn by decade

The table below breaks the full SSA timeline into ten-year windows. Each row shows how many male and female babies were given the name Kellyn during that decade, along with a combined total. This is useful for spotting eras where the name surged or retreated.

DecadeMaleFemaleTotal
1960s02727
1970s02626
1980s26571597
1990s30420450
2000s21470491
2010s106379485
2020s3783120

Geography

Where Kellyns live

The SSA's state-level files cover 13 states and territories. California, Texas, New York recorded the most babies named Kellyn, while New Jersey, Idaho, Florida recorded the fewest. The average across all reporting states is about 23 registrations each.

Origin

Meaning and history of Kellyn

The name Kellyn is a relatively modern variation of the traditional Irish name Cillian, which has its origins in the Gaelic language. Cillian is derived from the word "cill," meaning "church" or "monastery," and is believed to have originated as a surname for someone who lived or worked near a church or monastic settlement.

Kellyn is thought to have emerged as an anglicized spelling of Cillian, possibly to make the name more accessible and pronounceable for English speakers. While the exact timeline of this evolution is unclear, it likely gained popularity in the late 20th century as Irish names became more mainstream in English-speaking countries.

One of the earliest documented instances of the name Kellyn can be found in the 16th century, when it was recorded as a variant spelling of Cillian in historical records from Ireland. However, it was not until much later that the name gained widespread recognition and usage.

Throughout history, there have been several notable individuals who bore the name Kellyn or its variants. One of the most famous was Saint Cillian, an Irish missionary and martyr who lived in the 7th century. He is revered as the patron saint of several Irish counties and is celebrated for his efforts in spreading Christianity throughout the region.

Another prominent figure was Cillian Murphy, an Irish actor born in 1976, known for his roles in films such as "28 Days Later," "Inception," and "Peaky Blinders." His portrayal of complex and nuanced characters has earned him critical acclaim and a dedicated fan base.

In the literary world, Cillian Ó Coileáin was an Irish poet and language revivalist who lived from 1835 to 1920. He played a significant role in the Gaelic revival movement, contributing to the preservation and promotion of the Irish language and culture.

Cillian McDaid, born in 1965, is an Irish singer-songwriter and musician who has achieved success with his folk-rock band, The Cillian McDaid Band. His music has garnered a loyal following and critical praise, particularly within the Irish music scene.

Lastly, Cillian Barry, born in 1959, is an Irish actor and director who has made appearances in various television shows and films. He is known for his work in productions like "The Tudors" and "Ripper Street," and has also directed several stage plays.

While the name Kellyn may not have a long and storied history like some other ancient names, its Irish roots and connection to the Gaelic language and culture have given it a unique character and significance. As a modern variation of the traditional Cillian, it serves as a reminder of the enduring influence of Irish heritage and the evolution of names across time and cultures.

People

Kellyn + last name combinations

How many people share a full name with Kellyn as the first name? Click a combination below to see the estimate, or search any pairing.

Related

Other names starting with K

Other first names starting with K with a similar number of bearers.

FAQ

Kellyn: questions and answers

How many people in the U.S. are named Kellyn?

Name Census puts the figure at roughly 2,131 living Americans. We arrive at this by taking every SSA birth registration for Kellyn going back to 1880 and adjusting each cohort for expected survival using CDC actuarial life tables. The result is an age-weighted living-bearer count, not a raw birth total. That works out to about 1 in 160,842 US residents.

Is Kellyn a common name?

We classify Kellyn as "Rare". It ranks above 93.9% of all first names in the SSA dataset by living bearers. Across the full history of the data, 2,196 babies have been registered with this name.

When was Kellyn most popular?

The single biggest year for Kellyn was 1985, when 97 babies received the name. The fact that the average living Kellyn is about 26 years old gives you a rough sense of which era contributed the most bearers who are still alive today.

Is Kellyn a female name?

Yes, 90.0% of people registered as Kellyn in the SSA data are female. You can see the full per-sex comparison in the gender distribution section above, which includes the latest year rank, birth count, and peak year for each sex.

Where does this data come from?

First-name figures come from the Social Security Administration's national baby name files, which cover every name on a birth certificate from 1880 to 2024. Living-bearer estimates layer in CDC actuarial life tables broken out by sex to account for mortality. The population baseline (342,754,338) is the Census Bureau's latest national estimate. You can read the full calculation on our methodology page.

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