Theo
Masculine
Theo is given to both — 35,830 boys and 3,503 girls since 1880. See Theo as a girl nameSee other names given to both
Theo has been standing on its own for well over a century, first as an everyday clipping of Theodore in English and of Theodoor or Theobald in Dutch and German households, then as a full name in its own right. Two syllables, both wide open, ending on a vowel that carries across a playground. It travels almost unchanged from Amsterdam to Paris to Brooklyn.
How old is the name Theo?
Theo was already in use when US birth records began in 1880 — it is at least 145 years old. The typical Theo is a kid of about 3 — this name's wave is very recent. About 32,500 people named Theo are estimated to be alive in the US today.
When was the name Theo most popular?
Theo peaked in 2023, reaching #78 nationally. Today it ranks #82, 4 places below that high. See the whole 2023 chart.
Where it comes from
From Theodoros to Theo
The story of Theo
Theodoros was a common Greek name across the eastern Mediterranean and the Byzantine world, borne by early Christian saints and passed into Latin as Theodorus, then into English as Theodore. Separately, Germanic-speaking Europe had its own crop of theud- names — Theobald, Theodoric — which shortened to the same two syllables. By the nineteenth century Theo was in ordinary use as a familiar form on both sides of that divide, in English and in Dutch, where the Dutch modernist painter Theo van Doesburg carried it into the twentieth century. Its recent turn as a standalone given name in the United States is the newest chapter, not the first.
Meaningscholars disagree
'Gift of God' when it comes from Theodore; 'people' when it comes from Theobald or Theodoric
Theo sits at the meeting point of two unrelated words. Through Greek Theodoros it joins theos, 'god', with doron, 'gift' — the classic reading, 'gift of God'. But Dutch and German Theo just as often shortens Theobald or Theodoric, where the first element is Germanic theud, 'people' or 'tribe'. Both roads are real, and which one applies depends on the longer name behind it — or on nothing at all, if Theo is the whole name on the birth certificate.
Cultural footprint
Theo James (b. 1984) — The White Lotus and Divergent star
Source: Wikidata — the one source on this page that is not an official agency.
How the name formed
- Theodoros
- Theodorus
- Theodore
- Theo
Related forms: Théo · Theo · Theo · Teo · Teo · Theodoros
Pronouncing Theo
THEE-oh
In English the th is the soft, breathy kind, as in 'thin'. Dutch, German and French speakers say it closer to TAY-oh, and Spanish and Italian speakers tend to reach for Teo — worth knowing if the family spans more than one language.
Nicknames for Theo
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
- 20253,945 — the highest on record
- Peak rank
- #78reached in 2023
- Change vs 2022
- +8.3%3,945 in 2025, from 3,642
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.
Theo in other languages
The same name elsewhere
- Théo in French — spelling variant
- Theo in Dutch — same name
- Theo in German — same name
- Teo in Italian — spelling variant
- Teo in Spanish — spelling variant
- Theodoros in Greek — related form
Strongest US states over the last decade: California, Texas, New York. International figures from National Records of Scotland, Office for National Statistics, Statistics Canada. Sources
Theos among us
people named Theo are estimated to be alive in the US today
About 1 boy in 433 born in 2025 was named Theo
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 Jay test
Every popular name lives one long story — a climb, a peak, a slow settling back. Theo's later chapters haven't been written yet, so we borrowed them: Jay climbed just as high around 1960, and its whole arc is on record. Line the two peaks up, and Jay's path sketches the road Theo is walking now.
Theo is climbing fast right now. Steep climbs tend to come with steep descents — the quicker a name arrives, the more firmly it belongs to its moment.
A scored estimate from 146 years of naming cycles — not a prophecy. Great names outlive statistics. How this is scored
Where Theo is headed
Theo looks set to keep climbing gently, with roughly 36% more babies a year by 2030 if the current curve holds.
High 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.
Theo beside its neighbors
The names ranked closest to Theo in 2025, in babies rather than position — the bars are to scale.
US boys given each name in 2025.
The trade-off
- Short, phonetic and read correctly at first sight by most English speakers; almost nothing to spell out over the phone.
- Charts in Scotland, England and Wales, and Canada as well as the US — it crosses borders without changing shape.
- Works either as a complete name or as the everyday form of Theodore, Theodoric or Theobald, so the formal register is there if wanted.
- Already brief, so a child is unlikely to be handed a nickname he did not choose.
- It is climbing quickly, and the pattern of that climb means classmates named Theo are likelier over the next decade than they have been so far.
- It sits close to Leo and to Theodore in sound; expect occasional mix-ups, and expect people to assume the birth certificate says Theodore.
- If you want Theodore on paper, decide early which name the family will actually use — households often drift, and the child ends up answering to both.
Nobody names a baby alone.
Put Theo to the vote.
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What they receive
Someone added a name to your list
Theo
Masculine · #82 in the U.S.
Frequently asked
- How many Theos are there in the world?
- No country counts the world's names, so there is no worldwide figure — anyone quoting one is estimating. About 32,500 people named Theo are estimated to be alive in the US today.
- How popular is the name Theo in 2025?
- Theo ranks #82 among US boy names in 2025, with 3,945 babies given the name.
- How common is the name Theo?
- About 1 in every 433 US boys born in 2025 was named Theo — 3,945 in all.
- Will my child share the name Theo with classmates?
- Theo will almost certainly be the only one in school.
Ranked beside Theo
Names sitting at a similar level of popularity right now.
August#81 · Ian#83 · Adriel#84 · Aaron#80 · Luka#85 · Axel#79 · Gael#86 · Walker#78
Looking for what else is popular rather than what resembles Theo? See the current top 100.
Choosing between Theo and another name?
See them side by side — full stats, history and a gentle verdict.
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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; international figures from national statistics agencies. 1880–2025. Data & methodology
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