Kaius
Kaius was given to 216 boys in 2025, #1,029 among boys’ names; 2,011 Americans have been recorded with it since 2005 (Social Security Administration, published May 2026).
An estimated 2,000 Americans named Kaius and born in the U.S. are alive in 2026 (99% of everyone recorded); the median is 6 years old and half are between 3 and 9.
Girls and boys together; gaps are years SSA did not record (fewer than 5 births).
Births of Kaius by year: SSA national baby-name file, 1880-2025, published May 8, 2026. SSA’s notes on the data.
How popular is Kaius?
#1,029 among boys’ names, 2025
Kaius rose from #1,508 in 2015 to #1,029 in 2025 among boys’ names; its share of boys born rose from 0.06 to 0.13 per 1,000.
216 babies in 2025, the peak
Kaius peaked in 2025, when 216 boys were given it, #1,029 among boys’ names. In 2024 it went to 186 boys.
| Year | Births | Rank | Per 1,000 boys |
|---|---|---|---|
| 2025 | 216 | #1,029 | 0.13 |
| 2024 | 186 | #1,135 | 0.11 |
| 2023 | 189 | #1,121 | 0.11 |
| 2022 | 177 | #1,163 | 0.10 |
| 2021 | 180 | #1,132 | 0.10 |
| 2020 | 202 | #1,023 | 0.12 |
| 2019 | 169 | #1,155 | 0.09 |
| 2018 | 115 | #1,502 | 0.06 |
| 2017 | 94 | #1,691 | 0.05 |
| 2016 | 114 | #1,496 | 0.06 |
Every recorded year (21)
| Year | Births | Rank | Per 1,000 boys |
|---|---|---|---|
| 2015 | 110 | #1,508 | 0.06 |
| 2014 | 85 | #1,773 | 0.04 |
| 2013 | 45 | #2,643 | 0.02 |
| 2012 | 34 | #3,268 | 0.02 |
| 2011 | 27 | #3,842 | 0.01 |
| 2010 | 14 | #6,202 | 0.01 |
| 2009 | 15 | #5,945 | 0.01 |
| 2008 | 15 | #5,920 | 0.01 |
| 2007 | 10 | #7,878 | under 0.01 |
| 2006 | 7 | #10,113 | under 0.01 |
| 2005 | 7 | #9,619 | under 0.01 |
Ranks and shares: boys’ names in each year’s SSA file; share of all boys SSA recorded that year.
Is Kaius a boy’s or a girl’s name?
Kaius has been recorded only for boys: SSA lists no girls with the name in 21 years of records (it lists a name only in years with 5 or more babies of a sex).
Girls and boys named Kaius: the SSA national file counts each sex separately.
How many people are named Kaius, and how old are they?
2,000 alive in 2026, estimated
That is 99% of the 2,011 Americans ever recorded as Kaius. The median Kaius alive today is 6 years old; half are between 3 and 9.
Alive today, by age
Alive today, by generation
| Generation | Born | Alive |
|---|---|---|
| Generation Z | 1997-2012 | 128 |
| Generation Alpha | 2013-2025 | 1,870 |
An estimate, not a count. SSA’s files count people born in the United States who received a Social Security number, so anyone born abroad is not in them; before 1937 most people got a number as adults, and their survival is counted from that age.
Living estimate: SSA births carried forward with the survival rates in SSA’s cohort life tables (2024 Trustees Report) for each birth year and sex. How the estimate is made.
Where are babies named Kaius born?
The states with the most babies named Kaius are Texas, California and New York, with 35% of its births recorded by state in 2025.
| State | Births 2025 | Rank, boys | vs. national |
|---|---|---|---|
| Texas | 24 | #995 | 0.8× |
| California | 19 | #1,100 | 0.8× |
| New York | 13 | #969 | 0.7× |
| Florida | 12 | #1,096 | 0.8× |
| North Carolina | 12 | #741 | 0.9× |
| Georgia | 12 | #766 | 0.4× |
| Washington | 7 | #847 | 1.0× |
| Arizona | 7 | #814 | 0.8× |
| Missouri | 7 | #753 | 0.8× |
| Pennsylvania | 7 | #1,048 | 0.4× |
States: SSA state file, 1910-2025, published May 8, 2026; births count girls and boys together, and the rank is among boys’ names in the state in 2025. The file leaves out any state and year with fewer than 5 babies of the name, so small states are undercounted; each ratio compares the state’s births of Kaius with the births its national share predicts year by year, for states with at least 100 births of the name.
Names spelled alike
Of these 6 names spelled alike, given to 6,123 babies since 1880, Kaius is the second most given (33% of them). In 2025 it was given to 216 of their 571 babies (38%), again the second most given.
Spelled alike: names in the SSA national file with the same pattern of letters and sounds and at most two letters apart, and Wiktionary’s listed forms; births since 1880 and in 2025, and each name’s peak year, from the SSA national file, published May 8, 2026. Some are separate names, not spellings of one.
Names that rose and fell in the same decades as Kaius
Names whose births rose and fell across the same decades, measured on each decade’s share of births.
Similar histories: each decade’s share of births, from the SSA national file, 1880-2025, published May 8, 2026. SSA’s notes on the data.
More about Kaius and names like it
- Compare Kaius and CaiusBirths, ranks, peak and the living estimate side by side.
- The most given names of the 2020sKaius peaked in 2025.
- California’s most given namesThe state where SSA recorded the most babies named Kaius since 1910.
- The top names of 2025The year the most babies were named Kaius.
- The names of Generation AlphaMost people named Kaius alive today were born 2013-2025.
- Names starting with KMost given first.