Lou

#2,674 in 2025UnisexGirls' nameBoys' name

Famous in battle

Lou has been given to 38,198 babies in the U.S. since 1880. In 2025 it ranked #2,674 of 17,293 girls’ names in use. Its peak year was 1954, with 1,495 recorded. It's used for both sexes: 89% girls, 11% boys all-time.

Babies named Lou, 2025

1 in 51,000

Lou over time, 1880–2025

GirlsBoys
05001K1.5K18801900192019401960198020002020

Based on births in the U.S. Babies given the name each year. Hover the chart — or focus it and use the arrow keys — for any year. Gaps mean the name was given fewer than 5 times that year; these counts are unpublished.

Girls or boys — Lou over time

In 2025, Lou went to 45% girls and 55% boys.

18802025

A sex is only published in years it reached five applications, so a stretch at 0% or 100% means the other side stayed under that floor — not that it was never used.

Lou: meaning, origin, and history

Famous in battle

French and English, from Germanic

About Lou

Lou is a short form of both Louis and Louise, carrying their Germanic meaning “famous in battle.” Used in French and English, it reduces a large international name family to a single syllable. Its history includes a first lady, a baseball great, and an influential rock musician.

Meaning and related forms

Louis is the French form of Ludovicus, a Latinized version of Ludwig. The older Germanic name combines elements meaning “famous” and “battle.” Louise developed as the feminine form of Louis, giving Lou masculine and feminine routes within the same family.

Louisa, Lewis, and Louie are related names, as are French Louisette and Louison. Lulu belongs among the familiar forms associated with Louise. Lou keeps only the opening sound, pronounced LOO in both English and French. That makes it much shorter than many relatives while preserving their most immediately recognizable syllable.

Lou Henry Hoover

Lou Henry Hoover connects the name with education and public service. Born in Iowa in 1874, she became the first woman to graduate from Stanford University with a degree in geology. Her marriage to Herbert Hoover in 1899 began a partnership that took them around the world and eventually to the White House.

Her work included humanitarian food relief and involvement with the Girl Scouts. She also helped shape the family's surroundings, designing their California home and Camp Rapidan, the presidential retreat now within Shenandoah National Park. Her life gives the short name an association with scientific study as well as a prominent public role.

Baseball and songwriting

New York Yankees first baseman Lou Gehrig was born Henry Louis Gehrig, making his familiar name a clear example of Lou developing from Louis. He played 2,130 consecutive games, a record that became one of baseball's best-known measures of durability.

Gehrig's playing career ended in 1939, and he was elected to the Baseball Hall of Fame that same year. His achievements included a 1934 Triple Crown season, when he led the American League in batting average, home runs, and runs batted in.

Musician Lou Reed supplied a very different cultural connection. His work with the Velvet Underground and his solo songwriting became influential parts of twentieth-century rock music. He was inducted into the Rock & Roll Hall of Fame as a solo artist in 2015. Where Gehrig's Lou belongs to baseball history, Reed's is closely associated with an individual voice in songwriting and performance.

American popularity

Lou has appeared in United States records for both sexes. Its largest girls' count came in 1954, when 1,495 received the name at #204. It later became much rarer, with 65 girls recorded in 2025.

Boys' use remained modest but reached its largest annual count in 2025, with 81 births. These records count Lou as a registered name; its familiar use for people officially named Louis or Louise extends beyond those totals. Its American history therefore includes both independent use and everyday shortening.

Sources & methodologyReferences, data & attribution

Meaning and history draw on the references below. American popularity figures use published Social Security Administration records for this exact spelling; counts below five for a name, sex, and year are omitted. Existing Wiktionary material is available under CC BY-SA. Informal shortening suggestions are identified in the prose.

Wiktionary material is available under CC BY-SA 4.0.

How popular is Lou?

In 2025, Lou ranked #2,674 among girls in the United States, with 65 recorded uses. The U.S. birth records first list this spelling for girls in 1880; its largest annual count was 1,495 in 1954. Rankings count each spelling separately. They describe national use, so local familiarity can differ. The popularity chart shows whether the name has remained common, returned after a quieter period, or risen recently.

How common is Lou?

Everything below is computed from the 2025 data — the most recent year available.

Among all babies, 2025
1 in 51,000
65 of 3,315,165 births
Among girls only
1 in 24,700
<0.01% of girls
Rank, 2025
#2,674
of 17,293 girls’ names in use
Coin-flip room size
35,353 kids
Even odds of a second one

Where Lou sits on the popularity scale

Rarest published (5 a year)#1 — Olivia (13,544)

Chance at least one other child shares the name

If the other children were drawn at random from the 2025 national name distribution. Real classrooms cluster by region and community, so treat these as a floor, not a ceiling.

Class of 20Under 1%
Class of 30Under 1%
Grade of 100Under 1%
School of 500Under 1%

Put another way: gather 35,353 children born in 2025 and it's an even bet that one of them is another Lou. In a class of 30 the chance is Under 1%.

When Lous were born

Half of everyone ever recorded as Lou was born before 1942 — so the typical Lou is around 83 today.

Median birth year
1942
About 83 years old
Biggest decade
1950s
26.6% of all use
Born in the last 25 years
2.0%
Mostly a past generation
Recorded since 1950
13,834
People you could plausibly meet
Choose a decade

1950s — 26.6% of all recorded uses (9,084).

Is Lou rising or falling?

Rank movement and count movement can disagree — the number of distinct names in use keeps growing, so a name holding a steady count still slides down the list. Both are shown.

Rank vs 1 year ago
−153
Places dropped
Rank vs 5 years ago
+853
Places climbed
Rank vs 10 years ago
+2,133
Places climbed
Births vs 10 years ago
2.24×
More babies than then
Share of its own peak
4.3%
Peak was 1954 (1,495)
Years since peak
71
Years
Year-to-year steadiness
Shifting
24.8% average annual change
Best rank ever
#125
1880

Where Lou is used — girls

Across 1910–2025, Lou was most concentrated in Mississippi — about 1 in 1,639 girls, against 1 in 5,833 across all states with data. It was least common in Rhode Island (1 in 100,000).

161 per 100,000

Most concentrated

  1. 1Mississippi1 in 1,639
  2. 2Oklahoma1 in 1,887
  3. 3Arkansas1 in 1,923
  4. 4Kentucky1 in 1,923
  5. 5Louisiana1 in 2,174
  6. 6South Carolina1 in 2,222
  7. 7West Virginia1 in 2,439
  8. 8North Carolina1 in 2,778

Shading is the share of that state's recorded girls given this name, not the raw count — otherwise the map would just show which states are biggest. Unshaded states have no published records for this period. U.S. birth records suppress state-year counts below 5; state counts therefore don't add up to the national total. Every state links to its full rankings. Lou has too little recent state data to map, so this covers all years from 1910.

Where Lou is used — boys

Across 2016–2025, Lou was most concentrated in California — about 1 in 25,000 boys, against 1 in 44,260 across all states with data. It was least common in Texas (1 in 100,000).

14 per 100,000

Most concentrated

  1. 1California1 in 25,000
  2. 2Iowa1 in 25,000
  3. 3New York1 in 25,000
  4. 4Colorado1 in 50,000
  5. 5Minnesota1 in 50,000
  6. 6Wisconsin1 in 50,000
  7. 7Florida1 in 100,000
  8. 8Michigan1 in 100,000

Shading is the share of that state's recorded boys given this name, not the raw count — otherwise the map would just show which states are biggest. Unshaded states have no published records for this period. U.S. birth records suppress state-year counts below 5; state counts therefore don't add up to the national total. Every state links to its full rankings.

Lou around the world

Where Lou ranks in official birth records elsewhere in the world. Rankings only — the number of births isn’t comparable between places, so it isn’t shown.

  • England & Wales
    2002–2025
    #5,927
    in 2025
  • France
    1966–2025
    #12
    in 2025
  • Canada
    1999–2024
    #403
    in 2024
  • South Australia
    1985–2011
    #840
    in 2011

Popularity data from Office for National Statistics, Institut national de la statistique et des études économiques, Statistics Canada and Consumer and Business Services (South Australia). ONS data under Open Government Licence v3.0. INSEE data under Licence Ouverte / Etalab 2.0. StatCan data under Statistics Canada Open Licence. CBS SA data under CC BY 4.0.

Notable people named Lou

People whose public names include Lou, backed by Wikidata given-name records and ordered by linked Wikimedia pages. The name may be a middle name.

People data from Wikidata (CC0). Fame is measured, not judged — the order reflects how widely each person is documented, not the U.S. birth records popularity this page is otherwise about.

Lou in other languages

Cross-language forms and variants of Lou. Linked forms have their own page here.

Variant forms from Wikidata (CC0). Most are used mainly outside the United States; U.S. birth records statistics cover US usage only.

Lou by the numbers

The raw record for each sex the name is used for.

As a girl's name

Rank in 2025
#2,674
Trend vs 5 yrs ago
Up 853
Best rank ever
#125
1880
Peak year
1954
1,495 that year
First recorded
1880
Last recorded
2025
All-time count
34,109
Count in 2025
65

As a boy's name

Rank in 2025
#1,929
Trend vs 5 yrs ago
Up 410
Best rank ever
#452
1881
Peak year
2025
81 that year
First recorded
1880
Last recorded
2025
All-time count
4,089
Count in 2025
81

Names similar to Lou

Matched on shared beginnings and endings, similar length, and comparable popularity.

Names with a curve like Lou

Not spelling — timing. These names rose, peaked and faded in the same years as Lou, so they read as being from the same moment even when they look nothing alike.

Sibling names for Lou

Names from the same era and popularity tier — the two things that make a sibling set feel deliberate — skipping lookalike spellings and shared initials.

Explore around Lou