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Cillian Boy

Popularity: #416 · Trend: ↗ Rising

Name Meaning & Origin Pronunciation: KIL-ee-an /ˈkɪl.jən/

Origin: Irish; Gaelic

Meaning: Irish: slender; Gaelic: war; strife

Historical & Cultural Background

The name Cillian has its roots in the Irish language, derived from the Gaelic name "Cillín," which is a diminutive form of "cill," meaning "church" or "cell." The earliest forms of the name can be traced back to the early medieval period in Ireland, where it was often associated with monastic communities. The name is thought to have been borne by Saint Cillian, a 7th-century missionary who is venerated in parts of Ireland and Germany, further solidifying its religious significance.

Historically, Cillian gained prominence through its association with various saints and ecclesiastical figures. Saint Cillian, who was martyred in Würzburg, Germany, around 689 AD, played a crucial role in the spread of Christianity in the region.

His legacy contributed to the name's enduring presence in Irish culture, where it has been used for centuries. The name also appears in various historical texts and hagiographies, reflecting its importance in the ecclesiastical history of Ireland.

Cillian carries cultural resonance as a name linked to spirituality and community, often evoking images of monastic life and devotion. The name's association with churches and religious institutions has allowed it to maintain a sense of tradition and reverence throughout the centuries.

In addition to its primary form, the name has several variants and diminutives, such as "Killian," which have also been used historically, particularly in different regions of Ireland and beyond. This connection to both religious and cultural heritage has helped Cillian endure as a meaningful name within Irish history.

Famous people named Cillian

Cillian Murphy is an actor best known for Peaky Blinders, Inception, and 28 Days Later.
Cillian O'Connor is a Gaelic footballer best known for his performances with the Mayo senior team.

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U.S. Historical Usage

The name Cillian was first seen in the United States in 1995. Cillian has ranked as high as #753 nationally, which occurred in 2024, and has been most popular in New York, California, Massachusetts, Texas, and Pennsylvania. In the past 5 years the name Cillian has been trending up compared to the previous 5 years.

Popularity Over Time (National)

Top States for Cillian (2024)

State Births Share
NY 67
12%
CA 64
11%
PA 43
8%
FL 40
7%
MA 35
6%
TX 32
6%
IL 25
4%
TN 20
3%
VA 20
3%
WA 19
3%
NC 18
3%
MD 17
3%
AZ 15
3%
OH 15
3%
MI 14
2%

Popularity Over Time (National) — Table

YearBirths
19955
19995
20016
20048
200510
200642
200739
200851
200952
201054
201166
201273
201377
201487
2015121
2016177
2017170
2018193
2019186
2020228
2021340
2022352
2023476
2024668