NameTides

Caius

Caius was the #927 boys' name in the US in 2025 (254 babies), and #976 in England & Wales and #916 in Canada.

Caius as a boy’s name

  • US
  • England & Wales
  • Scotland
  • Northern Ireland
  • Canada
Caius as a boy’s name, US, England & Wales, Scotland, Northern Ireland, CanadaBabies per 1,000 in the published list, 1880–2025, for US, England & Wales, Scotland, Northern Ireland, Canada. Gaps mark years with too few babies to be published.00.130.250.380.518801900192019401960198020002020Northern IrelandCanadaUSEngland & Wales
Caius as a boy’s name, US, England & Wales, Scotland, Northern Ireland, CanadaBabies per 1,000 in the published list, 1880–2025, for US, England & Wales, Scotland, Northern Ireland, Canada. Gaps mark years with too few babies to be published.00.130.250.380.51880192019602000
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 IrelandCanada
2025#927 (254)#976 (31)—#395 (3)#916 (28)
2024#1,060 (206)#1,132 (25)——#1,156 (20)
2023#1,346 (140)#890 (35)——#1,283 (16)
2022#1,282 (150)#1,179 (23)——#1,142 (19)
2021#1,339 (138)#1,595 (15)——#1,230 (17)
2020#1,209 (156)#993 (28)#711 (3)—#878 (27)
2019#1,327 (137)#1,506 (16)——#917 (25)
2018#1,360 (130)#1,875 (12)——#993 (22)
2017#1,510 (110)#1,068 (27)——#937 (24)
2016#1,221 (153)#1,627 (15)——#1,069 (20)
2015#1,287 (138)#1,327 (19)——#954 (23)
2014#1,375 (124)#959 (30)——#898 (25)
2013#1,492 (109)#1,294 (19)——#874 (26)
2012#1,923 (74)#1,430 (17)——#1,202 (16)
2011#2,699 (44)#1,251 (20)#459 (6)—#958 (22)

The tide so far

  • Peaked in the US in 2025 at #927.
  • Rising over the last five years.
  • First recorded in the US in 1994.

How common is it?

about 1 in 6,700 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 6,700uncommon
England & WalesBoys2025about 1 in 8,800uncommon
Northern IrelandBoys2025about 1 in 2,800uncommon
CanadaBoys2025about 1 in 5,700uncommon

Next year

On its recent trend, Caius is likely to keep rising in the US in 2026: about 1 in 6,200 baby boys. Likely range 1 in 4,800 to 1 in 8,000.

Estimate, not an official figure. How we estimate.

Across the US

Caius by state, 2025Alaska: fewer than 5 babiesAKMaine: fewer than 5 babiesMEWisconsin: #785WIVermont: fewer than 5 babiesVTNew Hampshire: fewer than 5 babiesNHWashington: #737WAIdaho: fewer than 5 babiesIDMontana: fewer than 5 babiesMTNorth Dakota: fewer than 5 babiesNDMinnesota: #586MNIllinois: #1,280ILMichigan: #905MINew York: #1,760NYMassachusetts: #690MAOregon: fewer than 5 babiesORNevada: fewer than 5 babiesNVWyoming: fewer than 5 babiesWYSouth Dakota: fewer than 5 babiesSDIowa: fewer than 5 babiesIAIndiana: #621INOhio: #710OHPennsylvania: #846PANew Jersey: fewer than 5 babiesNJConnecticut: fewer than 5 babiesCTRhode Island: fewer than 5 babiesRICalifornia: #807CAUtah: fewer than 5 babiesUTColorado: fewer than 5 babiesCONebraska: fewer than 5 babiesNEMissouri: #709MOKentucky: fewer than 5 babiesKYWest Virginia: fewer than 5 babiesWVVirginia: #1,089VAMaryland: #571MDDelaware: fewer than 5 babiesDEArizona: #927AZNew Mexico: fewer than 5 babiesNMKansas: fewer than 5 babiesKSArkansas: fewer than 5 babiesARTennessee: #638TNNorth Carolina: #825NCSouth Carolina: fewer than 5 babiesSCDistrict of Columbia: fewer than 5 babiesDCOklahoma: #698OKLouisiana: fewer than 5 babiesLAMississippi: fewer than 5 babiesMSAlabama: fewer than 5 babiesALGeorgia: #1,096GAHawaii: fewer than 5 babiesHITexas: #892TXFlorida: #1,625FL
Caius (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#1,03310

Caius (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
CaiusCanadaBoys#91628
CaiusEngland & WalesBoys#97631
CaiusNorthern IrelandBoys#3953
CaiusScotlandBoys—too few
CaiusUSBoys#927254