Kaius
Boy name · #1029 in 2025 · Rare
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. Source: SSA.
Unlock the 5-year forecast and compare Kaius against up to 5 other names.
Uniqueness: will there be another Kaius in class?
On our rarity read — which blends how common Kaius is today with its five-year momentum — the name reads as "rare". A high score means genuine rarity — your Kaius will likely be the only one in the room, with the occasional spelling-out as the price.
Where Kaius is most common
Geography matters for names, and Kaius is no exception. Adjusted for how many boys are born in each state, Kaius is most common in GA (0.2 per 1,000), NC (0.2 per 1,000), NY (0.2 per 1,000), TX (0.1 per 1,000), FL (0.1 per 1,000) — against a national average of about 0.1 per 1,000 boys. These are per-capita rates, so they show where Kaius is a genuine regional favorite rather than just where the most babies are born.
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. On our rarity scale (rarity blended with momentum) we classify it as "rare".
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.