UK name, mostly girls
Lou
A diminutive of the French name Louis, of Old Frankish origin meaning "famous warrior".
For 2026, the newest official UK baby-name figures on this page are from 2024. That release is the current official benchmark rather than a forecast.
Also recorded as a boys' name in the UK, with 18 boys.
Lou is mostly registered for girls in the UK records. People looking for Lou popularity in 2026 should use the latest official release, which is 2024 in this profile. In that release it ranked #4843, with 4 babies registered with the name. Its strongest year in the published records was 2018, with 10 births.
This profile covers 59 England and Wales registrations across 13 recorded years from 2002 to 2024. 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 40% of the recorded peak, which gives a quick read on how the name has moved since its high point.
We estimate that about 59 living people in the UK are called Lou. 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 2025 or 2026.
Key insights
- • Lou ranked #4843 for girls in England and Wales in 2024, with 4 registrations.
- • The name peaked in 2018, when 10 girls were registered as Lou.
- • Lou is also recorded for boys, but the girls side is the larger UK variant in these records.
- • About 59 living people in the UK are estimated to have Lou as a first name, after adjusting past birth registrations with ONS life tables.
- • Across the England and Wales records shown here, 76.6% of Lou registrations are for girls.
Latest rank (E&W)
#4843
2024
Births in 2024
4
Latest year
Peak year
2018
10 births
Estimated living
59
2026
Gender
Boy and girl registrations for Lou
In England and Wales birth records, Lou has been registered for both boys and girls. Across the years shown here, 23.4% of registrations are for boys and 76.6% are for girls.
These figures use the sex categories in the published baby-name files. They are useful for spotting how the name is used at registration, but they are not a live measure of gender identity or everyone living with the name today.
Lou registered for boys
- Ranked #5,119 in 2024
- 3 boys registered in 2024
- Peak: 2019 (6 births)
Lou registered for girls
- Ranked #4,843 in 2024
- 4 girls registered in 2024
- Peak: 2018 (10 births)
Meaning
What does Lou mean?
The name Lou is a diminutive form of the masculine given name Louis, which originated from the Old Frankish Chlodovech. This name was composed of the Germanic elements hlod, meaning "famous," and wig, meaning "combat" or "battle." The name Louis first appeared in the 7th century AD and was borne by several Frankish kings, including Louis I, also known as Louis the Pious, who reigned from 814 to 840 AD.
Lou gained popularity as a shortened form of Louis during the Middle Ages. One of the earliest recorded instances of the name Lou is found in the 13th-century French epic poem "The Song of Roland," where it is used as a nickname for the character Lohier. In the 14th century, the Italian poet Dante Alighieri mentioned the name Lou in his famous work "The Divine Comedy."
Throughout history, several notable figures have borne the name Lou. One of the most famous is Lou Gehrig, an American baseball player who played for the New York Yankees from 1923 to 1939. He was nicknamed "The Iron Horse" and is remembered for his incredible streak of 2,130 consecutive games played. Lou Gehrig was born in 1903 and passed away in 1941.
Another prominent Lou is Lou Reed, an American singer-songwriter, and musician who was a founding member of the influential rock band The Velvet Underground. He was born in 1942 and his solo career spanned several decades until his death in 2013. Lou Reed's music had a significant impact on the development of alternative and indie rock genres.
In the world of literature, Lou Andreas-Salomé was a Russian-born psychoanalyst and writer who was closely associated with the philosophers Friedrich Nietzsche and Sigmund Freud. She was born in 1861 and lived until 1937, leaving a lasting mark on the fields of philosophy and psychoanalysis.
Lou Costello, born in 1906 and died in 1959, was an American comedian and actor who formed the famous comedic duo Abbott and Costello with Bud Abbott. Their comedy routines, such as "Who's on First?," became iconic and influential in the world of comedy.
Another notable Lou is Lou Brock, an American professional baseball player who played for the St. Louis Cardinals and is considered one of the greatest base stealers in Major League Baseball history. He was born in 1939 and played until 1979, earning induction into the Baseball Hall of Fame in 1985.
Sourced from namecensus.com.
Popularity
Lou over time
The chart below compares boys and girls registered as Lou in England and Wales, from 1999 to 2024. Empty years are left out so rare names are not stretched across long periods where the published files do not show any registrations.
For Lou, the clearest high point is 2018. The latest England and Wales figure is 4 births in 2024, compared with 10 at the peak.
Babies born per year
Decades
Lou by decade
Decade totals smooth out the yearly jumps and make it easier to see whether Lou 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 |
|---|---|---|---|
| 2020s | #5250 | 17 | 5 |
| 2010s | #3893 | 30 | 5 |
| 2000s | #4140 | 12 | 3 |
Related
Names similar to Lou
- 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
Lou: questions and answers
How popular is the name Lou in the UK right now?
In 2024, Lou was ranked #4843 for girls in England and Wales, with 4 births registered.
When was Lou most popular?
The peak year on record was 2018, with 10 babies registered as Lou in England and Wales.
What is the meaning and origin of Lou?
A diminutive of the French name Louis, of Old Frankish origin meaning "famous warrior".
How many people are called Lou in the UK?
A total of 59 babies have been registered as Lou across the 13 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.