UK girl's name
Leonni
A feminine Italian name derived from the Latin name Leonius, meaning "lion".
For 2026, the newest official UK baby-name figures on this page are from 2000. That release is the current official benchmark rather than a forecast.
Leonni is a girl's name in the UK records. People looking for Leonni popularity in 2026 should use the latest official release, which is 2000 in this profile. In that release it ranked #3247, with 4 babies registered with the name. Its strongest year in the published records was 2000, with 4 births.
This profile covers 7 England and Wales registrations across 2 recorded years from 1999 to 2000. 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.
Leonni is at its recorded peak in the England and Wales series.
We estimate that about 7 living people in the UK are called Leonni. 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 2001 or 2026.
Key insights
- • Leonni ranked #3247 for girls in England and Wales in 2000, with 4 registrations.
- • The name peaked in 2000, when 4 girls were registered as Leonni.
- • About 7 living people in the UK are estimated to have Leonni as a first name, after adjusting past birth registrations with ONS life tables.
Latest rank (E&W)
#3247
2000
Births in 2000
4
Latest year
Peak year
2000
4 births
Estimated living
7
2026
Meaning
What does Leonni mean?
The name Leonni has its origins in the ancient Roman language of Latin. It is a variation of the more commonly known name Leonius, which itself is derived from the Latin word "leo" meaning "lion." This suggests that the name Leonni was initially associated with strength, courage, and nobility, characteristics often attributed to the king of beasts.
The earliest known use of the name Leonni can be traced back to the 3rd century AD in the Roman Empire. It was particularly popular among the aristocratic class, as evidenced by its appearance in several Roman inscriptions and records from that era. One notable bearer of the name was Leonni Rufus, a Roman senator and military commander who lived during the reign of Emperor Claudius in the 1st century AD.
As the Roman Empire expanded, the name Leonni spread to various regions under its influence. It gained popularity in parts of Europe, particularly in Italy and Iberia, where it was adopted and adapted by local populations. During the Middle Ages, the name was also found in various religious texts and chronicles, indicating its continued use among Christian communities.
One of the earliest recorded examples of the name Leonni outside of Rome can be found in the writings of the 6th-century Italian philosopher and statesman Boethius. In his work "The Consolation of Philosophy," he makes reference to a certain Leonni, though little is known about this individual's identity or background.
Throughout history, several notable figures have borne the name Leonni. In the 12th century, there was Leonni of Pisa, an Italian mathematician and astronomer renowned for his contributions to the development of trigonometry. Another prominent bearer of the name was Leonni Battista Alberti (1404-1472), an Italian Renaissance humanist, author, artist, architect, and philosopher.
In the realm of art, the name Leonni is associated with the 16th-century Italian painter Leonni da Vinci (1499-1548), who was a contemporary and distant relative of the renowned Leonardo da Vinci. The artist Leonni da Vinci is best known for his religious works and portraits commissioned by prominent families in Florence and Rome.
Moving into the 19th century, Leonni Gambetta (1838-1882) was a French statesman and prime minister who played a crucial role in the establishment of the Third Republic in France. He is remembered for his influential political reforms and as a champion of the working class.
In more recent times, the name Leonni has been associated with the Italian-American children's book author and illustrator Leonni Lionni (1910-1999), whose whimsical stories and vibrant illustrations have delighted generations of young readers.
Sourced from namecensus.com.
Popularity
Leonni over time
The chart below shows babies named Leonni registered in England and Wales in the years where the name appears in the published records, from 1999 to 2000. Empty years are left out so rare names are not stretched across long periods where the published files do not show any registrations.
For Leonni, the clearest high point is 2000. The latest England and Wales figure is 4 births in 2000, compared with 4 at the peak.
Babies born per year
Decades
Leonni by decade
Decade totals smooth out the yearly jumps and make it easier to see whether Leonni 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 |
|---|---|---|---|
| 2000s | #3247 | 4 | 1 |
| 1990s | #3900 | 3 | 1 |
Related
Names similar to Leonni
- Lily 72,956
- Lucy 70,663
- Lauren 50,664
- Leah 33,185
- Lola 24,525
- Layla 24,520
- Laura 23,471
- Lilly 21,714
- Lydia 18,353
- Libby 14,515
- Lara 13,415
- Lacey 13,406
FAQ
Leonni: questions and answers
How popular is the name Leonni in the UK right now?
In 2000, Leonni was ranked #3247 for girls in England and Wales, with 4 births registered.
When was Leonni most popular?
The peak year on record was 2000, with 4 babies registered as Leonni in England and Wales.
What is the meaning and origin of Leonni?
A feminine Italian name derived from the Latin name Leonius, meaning "lion".
How many people are called Leonni in the UK?
A total of 7 babies have been registered as Leonni across the 2 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.