Kaius
Boy name · #1029 in 2025 · Uniqueness 61/100
In 2025, 216 baby boys were named Kaius, placing it at #1029 in the official national rankings. A decade ago it stood at #1502, so the name has been rising over the past ten years. Roughly one in every 8,333 boys born in 2025 was named Kaius.
The 20-year story
Kaius first appears in the Social Security records in 2005, when 7 boys received the name. Its all-time peak is essentially right now: 2025, with 216 babies and a rank of #1028. Names at their peak can keep climbing — or be one trend cycle from the long slide that eventually hits most popular names. Following the curve matters more than today's snapshot: a name's position on its rise-peak-decline arc is the best predictor of how common it will feel in a kindergarten class five years from now.
Babies named Kaius per year, 1880–2025. Source: SSA.
Unlock the 5-year forecast and compare Kaius against up to 5 other names.
Uniqueness: will there be another Kaius in class?
Kaius scores 61 out of 100 on our uniqueness scale, which blends current rarity with five-year momentum — putting it in the "distinctive" band. That middle band is the sweet spot many parents hunt for: recognizable without being everywhere.
Where Kaius is most common
Geography matters for names, and Kaius is no exception. In 2025 the states with the most Kaiuss were TX (24), CA (19), NY (13), FL (12), GA (12). Raw counts naturally favor populous states, but the spread still hints at where the name is part of the local naming culture.
Names like Kaius
Statistically, parents drawn to Kaius tend to be choosing among names with similar popularity arcs, era profiles, and sounds — the closest matches in our model are Caius, Kassius, Aurelius, Yunus, and Ignatius.
CaiusKassiusAureliusYunusIgnatiusCassiusLuciusPerseus
Rank history (last 25 years)
| Year | Babies named Kaius | Rank |
|---|---|---|
| 2025 | 216 | #1028 |
| 2024 | 186 | #1135 |
| 2023 | 189 | #1118 |
| 2022 | 177 | #1163 |
| 2021 | 180 | #1131 |
| 2020 | 202 | #1023 |
| 2019 | 169 | #1152 |
| 2018 | 115 | #1498 |
| 2017 | 94 | #1681 |
| 2016 | 114 | #1491 |
| 2015 | 110 | #1502 |
| 2014 | 85 | #1766 |
| 2013 | 45 | #2623 |
| 2012 | 34 | #3231 |
| 2011 | 27 | #3792 |
| 2010 | 14 | #6036 |
| 2009 | 15 | #5800 |
| 2008 | 15 | #5767 |
| 2007 | 10 | #7590 |
| 2006 | 7 | #9585 |
| 2005 | 7 | #9115 |
Frequently asked questions
Is Kaius a popular boy name?
Kaius ranked #1029 among boys in 2025 with 216 babies given the name — outside the top 500, making it an uncommon pick. Ten years earlier it ranked #1502.
When was the name Kaius most popular?
Kaius peaked in 2025, when 216 American boys received the name (ranked #1028 that year). That peak is current — the name is at or near its all-time high right now.
How rare is the name Kaius?
In 2025, roughly 1 in 8,333 newborn American boys was named Kaius. It scores 61/100 on our uniqueness scale (rarity blended with momentum), which we classify as "distinctive".
Data source: U.S. Social Security Administration name statistics, 1880–2025, national and state files. Counts reflect Social Security card applications; names with fewer than 5 occurrences in a state-year are suppressed by the SSA.