Lou
Masculine · “famous warrior”
Lou is given to both — 4,089 boys and 34,109 girls since 1880. See Lou as a girl nameSee other names given to both
Lou is Louis cut to one syllable, and the Frankish compound behind it is famous warrior — the name eighteen French kings carried.
How old is the name Lou?
Lou was already in use when US birth records began in 1880 — it is at least 145 years old. The typical Lou alive today was born around 1958, making them about 67 years old. About 2,400 people named Lou are estimated to be alive in the US today.
When was the name Lou most popular?
Lou peaked in 1881, reaching #442 nationally. Today it ranks #1919, 1,477 places below that high. See the whole 1881 chart.
Where it comes from
From Chlodovech to Lou
The story of Lou
Clovis was baptized around 496 and his name, worn down through Frankish and French, became the great royal name of France. English took Louis and clipped it to Lou. American families registered the clipping outright from the 1900s, often in the compound Lou-something. It appears in the registers in current use.
Meaning
famous warrior
Through Louis, from the Germanic hlud, 'famous', and wig, 'war'. The same compound gives Ludwig, Luigi and the Frankish Chlodovech, which also produced Clovis. Both elements are ordinary words and the compound is transparent and undisputed.
How the name formed
- Chlodovech
- Louis
- Lou
Related forms: Louis · Ludwig · Luigi
Pronouncing Lou
LOO
One syllable. Lou and Lew are homophones; only the spelling differs.
Nicknames for Lou
Moderate
What the data says
146 years of official birth records
The long climb, and where it stands now
The same years in position rather than babies
- First recorded
- 1880
- Most boys named
- 202581 — the highest on record
- Peak rank
- #442reached in 1881
- Change vs 2022
- +6.6%81 in 2025, from 76
Rank is a position, a count is a headcount, and they move independently — a name can hold its rank while the number of babies behind it falls. Source: U.S. Social Security Administration.
Lou in other languages
The same name elsewhere
- Louis in French — related form
- Ludwig in German — related form
- Luigi in Italian — related form
Strongest US states over the last decade: California, New York, Texas.
Lous among us
people named Lou are estimated to be alive in the US today
About 1 boy in 21,087 born in 2025 was named Lou
Estimated from SSA birth records and published actuarial life tables. Method
Is it right for you
What happens to a name after it peaks
Fashion outlook
Lou is on its second act. Revived names age gently: the generation that wore them first is far enough away that the name feels classic rather than dated.
A scored estimate from 146 years of naming cycles — not a prophecy. Great names outlive statistics. How this is scored
Where Lou is headed
Lou looks set to keep climbing gently, with roughly 15% more babies a year by 2030 if the current curve holds.
Medium confidence — fitted on official counts through 2025.
A damped-trend projection of the official birth data — a sketch of momentum, not a promise. Every name's forecast, ranked.
Lou beside its neighbors
The names ranked closest to Lou in 2025, in babies rather than position — the bars are to scale.
US boys given each name in 2025.
The trade-off
- The famous-warrior meaning is transparent and undisputed.
- Louis is available as a full formal version with a thousand years of royal use.
- Three letters, one syllable, and never misheard.
- It is thoroughly unisex, also serving Louise and Lucy.
- Given outright it stays informal; Louis on the certificate keeps both registers.
- It is very short and can be swallowed by a long surname.
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What they receive
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Lou
Masculine · #1919 in the U.S.
Frequently asked
- How many Lous are there in the world?
- No country counts the world's names, so there is no worldwide figure — anyone quoting one is estimating. About 2,400 people named Lou are estimated to be alive in the US today.
- How popular is the name Lou in 2025?
- Lou ranks #1919 among US boy names in 2025, with 81 babies given the name.
- How rare is the name Lou?
- About 1 in every 21,087 US boys born in 2025 was named Lou — 81 in all.
- Will my child share the name Lou with classmates?
- Lou will almost certainly be the only one in school.
Ranked beside Lou
Names sitting at a similar level of popularity right now.
Karsen#1919 · Hendrick#1919 · Asad#1919 · Elwood#1919 · Mikel#1919 · Azari#1919 · Jawad#1919 · Rumi#1919
Looking for what else is popular rather than what resembles Lou? See the current top 100.
Choosing between Lou and another name?
See them side by side — full stats, history and a gentle verdict.
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Which one would you pick?
Your gut first, the numbers after — the split shows once you pick.
US figures from the Social Security Administration. 1880–2025. Data & methodology
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