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Kaius

#1,029 in 2025Boys' name

Meaning and linguistic origin unconfirmed

Kaius has been given to 2,011 babies in the U.S. since 2005. In 2025 it ranked #1,029 of 13,926 boys’ names in use. Its peak year was 2025, with 216 recorded.

Babies named Kaius, 2025

1 in 15,300

Kaius over time, 1880–2025

Boys
010020030018801900192019401960198020002020

Based on births in the U.S. Babies given the name each year. Hover the chart — or focus it and use the arrow keys — for any year. Gaps mean the name was given fewer than 5 times that year; these counts are unpublished.

Kaius: meaning, origin, and history

Meaning and linguistic origin unconfirmed

Deeper origin not confirmed in the cited records

What Kaius means

Kaius is a given name.

The naming story behind Kaius

Wikidata records Kaius as a given name, male given name. The entity identifier is Q116759331, and the classification was checked on 2026-10-20. The spelling matches a source label or alias exactly, without removing accents or linking it to a name merely because the letters look similar.

A database classification is different from an etymological explanation, so those questions remain open in the short meaning.

A modern root explanation needs an additional naming or linguistic reference.

American usage and historical context

In the United States, 2,011 boys were recorded with the name Kaius between 2005 and 2025. Its highest annual count was 216 in 2025; its best national rank was #1,023 in 2020.

Over 5 years its rank fell, from #1,023 in 2020 to #1,029 in 2025. Over 10 years its rank rose, from #1,508 in 2015 to #1,029 in 2025.

Sources & methodologyReferences, data & attribution

Meaning, origin, and language notes draw on the references below.

American popularity figures use published Social Security Administration records for this exact spelling. Counts below five for a name, sex, and year are omitted.

How common is Kaius?

Everything below is computed from the 2025 data — the most recent year available.

Among all babies, 2025
1 in 15,300
216 of 3,315,165 births
Among boys only
1 in 7,910
0.01% of boys
Rank, 2025
#1,029
of 13,926 boys’ names in use
Coin-flip room size
10,640 kids
Even odds of a second one

Where Kaius sits on the popularity scale

Rarest published (5 a year)#1 — Liam (20,818)

Chance at least one other child shares the name

If the other children were drawn at random from the 2025 national name distribution. Real classrooms cluster by region and community, so treat these as a floor, not a ceiling.

Class of 20Under 1%
Class of 30Under 1%
Grade of 100Under 1%
School of 5003%

Put another way: gather 10,640 children born in 2025 and it's an even bet that one of them is another Kaius. In a class of 30 the chance is Under 1%.

When Kaiuss were born

Half of everyone ever recorded as Kaius was born before 2020 — so the typical Kaius is around 5 today.

Median birth year
2020
About 5 years old
Biggest decade
2020s
57.2% of all use
Born in the last 25 years
100.0%
A modern name
Recorded since 1950
2,011
People you could plausibly meet
Choose a decade

2020s — 57.2% of all recorded uses (1,150).

Is Kaius rising or falling?

Rank movement and count movement can disagree — the number of distinct names in use keeps growing, so a name holding a steady count still slides down the list. Both are shown.

Rank vs 1 year ago
+106
Places climbed
Rank vs 5 years ago
−6
Places dropped
Rank vs 10 years ago
+479
Places climbed
Births vs 10 years ago
1.96×
More babies than then
Share of its own peak
100.0%
Peak was 2025 (216)
Years since peak
Peaking now
At its all-time high
Year-to-year steadiness
Volatile
25.8% average annual change
Best rank ever
#1,023
2020

Spellings of Kaius

Kaius is not the most common spelling — Kai is, with 38.8% against Kaius's 1.1%.

Grouped by closeness of spelling (up to two letter changes), same sex, with a floor on all-time use. It catches Sophia/Sofia and Aiden/Ayden, and misses spellings that sound alike but look different, like Sean and Shawn.

Where Kaius is used

Across 2016–2025, Kaius was most concentrated in Hawaii — about 1 in 3,226 boys, against 1 in 13,471 across all states with data. It was least common in New Jersey (1 in 100,000).

131 per 100,000

Most concentrated

  1. 1Hawaii1 in 3,226
  2. 2Washington1 in 7,143
  3. 3North Carolina1 in 8,333
  4. 4Arizona1 in 9,091
  5. 5Missouri1 in 9,091
  6. 6Ohio1 in 9,091
  7. 7Wisconsin1 in 10,000
  8. 8Florida1 in 11,111

Shading is the share of that state's recorded boys given this name, not the raw count — otherwise the map would just show which states are biggest. Unshaded states have no published records for this period. U.S. birth records suppress state-year counts below 5; state counts therefore don't add up to the national total. Every state links to its full rankings.

Kaius around the world

Where Kaius ranks in official birth records elsewhere in the world. Rankings only — the number of births isn’t comparable between places, so it isn’t shown.

  • England & Wales
    2000–2025
    #1,197
    in 2025
  • Scotland
    2023–2023
    #728
    in 2023
  • Ireland
    2021–2021
    #631
    in 2021
  • Canada
    2008–2024
    #1,011
    in 2024
  • South Australia
    2013–2013
    #754
    in 2013

Popularity data from Office for National Statistics, National Records of Scotland, Central Statistics Office, Statistics Canada and Consumer and Business Services (South Australia). ONS, NRS data under Open Government Licence v3.0. CSO, CBS SA data under CC BY 4.0. StatCan data under Statistics Canada Open Licence.

Kaius by the numbers

The raw record for each sex the name is used for.

As a boy's name

Rank in 2025
#1,029
Trend vs 5 yrs ago
Down 6
Best rank ever
#1,023
2020
Peak year
2025
216 that year
First recorded
2005
Last recorded
2025
All-time count
2,011
Count in 2025
216

Names similar to Kaius

Matched on shared beginnings and endings, similar length, and comparable popularity.

KaitoKaineKaisenKainoaKaidynKaizerKaizenKainenKailoKairiKaidanKainCaiusKaiserKaigeKailenKainanKaisynKailebKailerKairoKairosKaielArius

Names with a curve like Kaius

Not spelling — timing. These names rose, peaked and faded in the same years as Kaius, so they read as being from the same moment even when they look nothing alike.

JaxtynGrangerBowieMatheoArhamAtharvKaisenWrenLenoxLyamRyattEzrah

Sibling names for Kaius

Names from the same era and popularity tier — the two things that make a sibling set feel deliberate — skipping lookalike spellings and shared initials.

Explore around Kaius

Top names of 2025, Kaius's peak yearThe 2020s in fullOther names that peaked in 2020Boys' names starting with K