UK boy's name
Ki
A Japanese gender-neutral name meaning "radiant, bright, or tree".
For 2026, the newest official UK baby-name figures on this page are from 2019. That release is the current official benchmark rather than a forecast.
Ki is a boy's name in the UK records. People looking for Ki popularity in 2026 should use the latest official release, which is 2019 in this profile. In that release it ranked #4702, with 3 babies registered with the name. Its strongest year in the published records was 2005, with 11 births.
This profile covers 95 England and Wales registrations across 16 recorded years from 1996 to 2019. The figures come from ONS England and Wales, so the page is a view of published baby-name registrations rather than a forecast or a live count of people using the name today.
The latest count is about 27% of the recorded peak, which gives a quick read on how the name has moved since its high point.
We estimate that about 94 living people in the UK are called Ki. This uses published birth registrations from England and Wales, Scotland and Northern Ireland, then applies ONS national life tables to estimate how many are likely still alive. It does not forecast extra births for 2020 or 2026.
Key insights
- • Ki ranked #4702 for boys in England and Wales in 2019, with 3 registrations.
- • The name peaked in 2005, when 11 boys were registered as Ki.
- • About 94 living people in the UK are estimated to have Ki as a first name, after adjusting past birth registrations with ONS life tables.
Latest rank (E&W)
#4702
2019
Births in 2019
3
Latest year
Peak year
2005
11 births
Estimated living
94
2026
Meaning
What does Ki mean?
The name Ki is a Japanese given name that has its origins in the ancient language of the country. It is a shortened form of the name Kiyoshi, which means "pure" or "quiet." The name Ki can also be written using the kanji characters 喜, which signifies "joy" or "happiness." This name has been in use in Japan for centuries, with records dating back to the Heian period (794-1185 CE).
One of the earliest mentions of the name Ki can be found in the Kojiki, an ancient Japanese chronicle compiled in 712 CE. The text mentions a legendary figure named Ki no Tsurayuki, who was a renowned poet and scholar during the Heian period. He played a significant role in the compilation of the Kokinshū, an anthology of ancient Japanese poetry.
Throughout Japanese history, there have been several notable individuals who bore the name Ki. One such person was Ki Nobunao (1565-1614), a samurai warrior who served under the powerful daimyo Tokugawa Ieyasu during the Sengoku period. Another notable figure was Ki Inamoto (1510-1600), a Buddhist monk and poet who lived during the Azuchi-Momoyama period.
In the realm of arts and literature, Ki Tsurayuki (872-945) was a renowned waka poet and courtier during the Heian period. He is best known for his contributions to the Kokinshū anthology and is regarded as one of the greatest poets in Japanese history.
Moving into more recent times, Ki Hisamatsu (1889-1980) was a prominent Japanese philosopher and Buddhist scholar who played a significant role in the development of the Kyoto School of philosophy.
Lastly, Ki Noboru (1891-1977) was a Japanese politician and diplomat who served as the Foreign Minister of Japan during the turbulent years of World War II.
Sourced from namecensus.com.
Popularity
Ki over time
The chart below shows babies named Ki registered in England and Wales in the years where the name appears in the published records, from 1996 to 2019. Empty years are left out so rare names are not stretched across long periods where the published files do not show any registrations.
For Ki, the clearest high point is 2005. The latest England and Wales figure is 3 births in 2019, compared with 11 at the peak.
Babies born per year
Decades
Ki by decade
Decade totals smooth out the yearly jumps and make it easier to see whether Ki was a short-lived spike or a name that stayed in regular use. Average rank is calculated only from years where a published rank exists.
| Decade | Average rank | Total births | Years covered |
|---|---|---|---|
| 2010s | #4122 | 15 | 4 |
| 2000s | #2202 | 66 | 9 |
| 1990s | #2209 | 14 | 3 |
Related
Names similar to Ki
- Kieran 30,429
- Kyle 28,463
- Kai 24,432
- Kian 17,666
- Kayden 8,305
- Kevin 7,927
- Kane 7,149
- Kaiden 5,762
- Kieron 4,547
- Kacper 4,366
- Kye 4,012
- Kit 3,529
FAQ
Ki: questions and answers
How popular is the name Ki in the UK right now?
In 2019, Ki was ranked #4702 for boys in England and Wales, with 3 births registered.
When was Ki most popular?
The peak year on record was 2005, with 11 babies registered as Ki in England and Wales.
What is the meaning and origin of Ki?
A Japanese gender-neutral name meaning "radiant, bright, or tree".
How many people are called Ki in the UK?
A total of 95 babies have been registered as Ki across the 16 years of ONS England & Wales records shown here.
Which records is this page based on?
The England and Wales timeline uses ONS baby-name records. Scotland figures come from NRS and Northern Ireland figures come from NISRA. Counts are registrations in published baby-name files. The living estimate uses those birth registrations with ONS national life tables.