NameTides

Cillian

Cillian was the #507 boys' name in the US in 2025 (595 babies), and #217 in England & Wales and #437 in Canada.

Cillian as a boy’s name

  • US
  • England & Wales
  • Scotland
  • Northern Ireland
  • Ireland
  • Canada
Cillian as a boy’s name, US, England & Wales, Scotland, Northern Ireland, Ireland, CanadaBabies per 1,000 in the published list, 1880–2025, for US, England & Wales, Scotland, Northern Ireland, Ireland, Canada. Gaps mark years with too few babies to be published.0510152018801900192019401960198020002020Northern IrelandIrelandScotlandEngland & WalesCanadaUS
Cillian as a boy’s name, US, England & Wales, Scotland, Northern Ireland, Ireland, CanadaBabies per 1,000 in the published list, 1880–2025, for US, England & Wales, Scotland, Northern Ireland, Ireland, Canada. Gaps mark years with too few babies to be published.051015201880192019602000
Babies per 1,000 of the same sex in each published list. Breaks in a line are years with too few babies to be published.
Show the numbers
YearUSEngland & WalesScotlandNorthern IrelandIrelandCanada
2025#507 (595)#217 (230)#100 (51)#11 (95)#9 (271)#437 (74)
2024#463 (668)#177 (285)#83 (62)#2 (142)#4 (352)#471 (65)
2023#594 (477)#204 (241)#99 (53)#4 (128)#9 (275)#528 (52)
2022#735 (353)#223 (227)#123 (46)#9 (111)#9 (316)#582 (46)
2021#747 (341)#274 (168)#120 (45)#8 (116)#9 (322)#729 (37)
2020#957 (228)#238 (202)#150 (34)#9 (111)#11 (302)#619 (41)
2019#1,078 (186)#254 (193)#140 (41)#14 (104)#17 (289)#840 (28)
2018#1,052 (193)#255 (199)#148 (39)#13 (117)#17 (289)#762 (32)
2017#1,126 (170)#324 (151)#204 (25)#15 (109)#16 (302)#937 (24)
2016#1,105 (177)#380 (119)#234 (20)#31 (79)#22 (298)#1,026 (21)
2015#1,416 (121)#404 (104)#224 (21)#25 (88)#22 (299)#812 (29)
2014#1,730 (87)#550 (66)#276 (15)#48 (63)#20 (350)#1,465 (12)
2013#1,851 (77)#730 (44)#335 (11)#46 (64)#23 (322)#1,551 (11)
2012#1,942 (73)#734 (45)#392 (8)#60 (55)#23 (341)#2,368 (6)
2011#2,035 (66)#798 (38)#325 (11)#66 (52)#22 (360)#2,125 (7)

The tide so far

  • Peaked in the US in 2024 at #463.
  • Rising over the last five years.
  • First recorded in the US in 1995.

How common is it?

about 1 in 2,900 baby boys in the published US list for 2025.

In a group of 1,000 children born that year, you would expect to meet fewer than 1. How we work this out.

How common, country by country

WhereSexLatest yearShareVerdict
USBoys2025about 1 in 2,900uncommon
England & WalesBoys2025about 1 in 1,200uncommon
ScotlandBoys2025about 1 in 390common
Northern IrelandBoys2025about 1 in 87very common
IrelandBoys2025about 1 in 88very common
CanadaBoys2025about 1 in 2,200uncommon

Next year

On its recent trend, Cillian is likely to keep rising in the US in 2026: about 1 in 2,100 baby boys. Likely range 1 in 1,600 to 1 in 2,800.

Estimate, not an official figure. How we estimate.

Across the US

Cillian by state, 2025Alaska: #165AKMaine: fewer than 5 babiesMEWisconsin: #484WIVermont: fewer than 5 babiesVTNew Hampshire: #230NHWashington: #425WAIdaho: fewer than 5 babiesIDMontana: fewer than 5 babiesMTNorth Dakota: fewer than 5 babiesNDMinnesota: #511MNIllinois: #363ILMichigan: #768MINew York: #350NYMassachusetts: #307MAOregon: #398ORNevada: fewer than 5 babiesNVWyoming: fewer than 5 babiesWYSouth Dakota: fewer than 5 babiesSDIowa: fewer than 5 babiesIAIndiana: #621INOhio: #357OHPennsylvania: #397PANew Jersey: #344NJConnecticut: #382CTRhode Island: #200RICalifornia: #509CAUtah: #561UTColorado: #346CONebraska: fewer than 5 babiesNEMissouri: #518MOKentucky: fewer than 5 babiesKYWest Virginia: fewer than 5 babiesWVVirginia: #329VAMaryland: #516MDDelaware: #203DEArizona: #634AZNew Mexico: #270NMKansas: #590KSArkansas: fewer than 5 babiesARTennessee: #520TNNorth Carolina: #431NCSouth Carolina: #608SCDistrict of Columbia: fewer than 5 babiesDCOklahoma: #504OKLouisiana: #775LAMississippi: #522MSAlabama: fewer than 5 babiesALGeorgia: #919GAHawaii: fewer than 5 babiesHITexas: #778TXFlorida: #585FL
Cillian (boys) rank in each state, 2025. Hatched states recorded fewer than 5 babies.
  • #1–10
  • #11–50
  • #51–100
  • #101–500
  • below #500

Across Canada

ProvinceYearRankBabies
Ontario2024#39732
Quebec2025#6236

Cillian (boys): rank in each province’s latest list. Only Quebec and Ontario publish full name lists; Ontario’s latest list is a year behind.

Spellings

Official statistics count each spelling separately, so we show them side by side rather than adding them up.

SpellingWhereSexLatest rankBabies
CillianCanadaBoys#43774
CillianEngland & WalesBoys#217230
CillianIrelandBoys#9271
CillíanIrelandBoys#5775
CillianNorthern IrelandBoys#1195
CillianScotlandBoys#10051
CillianUSGirls—too few
CillianUSBoys#507595