Marylou
Feminine
Marylou writes Mary Lou as one word — the American compound name closed up, which is how a great many two-word names became single ones in the twentieth century.
How old is the name Marylou?
Marylou first appears in US birth records in 1898 — 127 years ago. The typical Marylou alive today was born around 1946, making them about 79 years old. About 7,900 people named Marylou are estimated to be alive in the US today.
When was the name Marylou most popular?
Marylou peaked in 1937, reaching #350 nationally. Today it ranks #4758, 4,408 places below that high. See the whole 1937 chart.
Lists built from the same records:
Where it comes from
From Mary Lou to Marylou
The story of Marylou
American families of the 1920s to 1950s used compound first names heavily, particularly in the South — Mary Lou, Betty Jo, Bobbie Jean — and the two words were often closed up on the certificate. Marylou appears in the registers as the single-word form and peaked around 1943.
Meaningscholars disagree
Not established
A compound of Mary and Lou. Mary's own origin is unrecovered — proposals include the Egyptian mry, 'beloved', and Hebrew readings meaning 'bitter' or 'wished-for child'. Lou comes through Louise from the Germanic hlud, 'famous', and wig, 'war'. The first half does not resolve; the second does.
How the name formed
- Mary Lou
- Marylou
Related forms: Marylu · Marilou · Marilou
Pronouncing Marylou
MAIR-ee-loo
Three syllables, stress on the first. Marylou and Mary Lou are said identically.
Nicknames for Marylou
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
- 1898
- Most girls named
- 1943373 — the highest on record
- Peak rank
- #350reached in 1937
- Change vs 2022
- +7.7%28 in 2025, from 26
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.
Marylou in other languages
The same name elsewhere
- Marylu in English — spelling variant
- Marilou in English — spelling variant
- Marilou in French — related form
Strongest US states over the last decade: California, Florida.
Marylous among us
people named Marylou are estimated to be alive in the US today
About 1 girl in 57,402 born in 2025 was named Marylou
Estimated from SSA birth records and published actuarial life tables. Method
Is it right for you
What happens to a name after it peaks
The Reva test
Every popular name lives one long story — a climb, a peak, a slow settling back. Marylou's later chapters haven't been written yet, so we borrowed them: Reva climbed just as high around 1921, and its whole arc is on record. Line the two peaks up, and Reva's path sketches the road Marylou is walking now.
Marylou sits in the calm middle of the cycle — neither chasing a wave nor sliding off one. Middle-of-the-cycle names age slowly and predictably.
A scored estimate from 146 years of naming cycles — not a prophecy. Great names outlive statistics. How this is scored
Where Marylou is headed
Marylou should hold steady through 2030 — the curve is flat, and flat curves are the most predictable kind. Its history is short or jumpy, though, so read this as a sketch rather than a promise.
Low 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.
Marylou beside its neighbors
The names ranked closest to Marylou in 2025, in babies rather than position — the bars are to scale.
US girls given each name in 2025.
The trade-off
- It carries the most-used name in European history in its first half.
- Mary and Lou are two short forms, both complete names.
- It records a real and geographically specific American naming practice.
- The two-word Mary Lou is the commoner form.
- Mary's own meaning is genuinely unrecovered.
- It is strongly period-coded to the 1940s and 1950s.
Nobody names a baby alone.
Put Marylou to the vote.
Add it to a family vote or a couple’s swipe deck — the other person gets one card, a simple answer and room to say why. No app, no account for them.
Only the people you invite can see your list.
Already decided on Marylou? Hide it among decoys and let them guess.
What they receive
Someone added a name to your list
Marylou
Feminine · #4758 in the U.S.
Frequently asked
- How many Marylous are there in the world?
- No country counts the world's names, so there is no worldwide figure — anyone quoting one is estimating. About 7,900 people named Marylou are estimated to be alive in the US today.
- How popular is the name Marylou in 2025?
- Marylou ranks #4758 among US girl names in 2025, with 28 babies given the name.
- How rare is the name Marylou?
- About 1 in every 57,402 US girls born in 2025 was named Marylou — 28 in all.
- Will my child share the name Marylou with classmates?
- Marylou will almost certainly be the only one in school.
Ranked beside Marylou
Names sitting at a similar level of popularity right now.
Landon#4758 · Lexa#4758 · Alysia#4758 · Ixchel#4758 · Parisa#4758 · Jumana#4758 · Jadyn#4758 · Berenice#4758
Looking for what else is popular rather than what resembles Marylou? See the current top 100.
Choosing between Marylou and another name?
See them side by side — full stats, history and a gentle verdict.
Compare side by sideIn a hurry? Just pick a winner — one tap, no sign-up, and you see how everyone else voted.
Weighing a whole shortlist? Add the rest in the builder, or settle it with a bracket.
Cast your vote
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
No advertising trackers and no data sellinghow we handle your dataindependent and founder-run, about Name Battle