Head to head · Boys' names
Thiago vs Thomas
#50 vs #34 in 2025
Thomas is a whisker ahead (#34 vs #50 in 2025), but the curves point different ways: Thomas is back after a long quiet spell, Thiago is climbing the charts fast. On momentum, Thiago has the edge.
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Which one would you pick?
Your gut first, the numbers after — the split shows once you pick.
The tale of the tape
On the charts, Thomas leads 5 measures of 6; Thiago leads 1.
Ranks, counts and years are measured in the official US birth record; the classroom and living figures are estimates computed from it. The dot marks the side each measure favours on the charts — more common, not better.
What the records say
146 years of US births, drawn on one scale
Two curves, one scale
Who owned which decade
- 1880s: Thiago —, Thomas #10 — Thomas higher
- 1890s: Thiago —, Thomas #12 — Thomas higher
- 1900s: Thiago —, Thomas #11 — Thomas higher
- 1910s: Thiago —, Thomas #10 — Thomas higher
- 1920s: Thiago —, Thomas #11 — Thomas higher
- 1930s: Thiago —, Thomas #9 — Thomas higher
- 1940s: Thiago —, Thomas #8 — Thomas higher
- 1950s: Thiago —, Thomas #8 — Thomas higher
- 1960s: Thiago —, Thomas #10 — Thomas higher
- 1970s: Thiago —, Thomas #21 — Thomas higher
- 1980s: Thiago #4895, Thomas #24 — Thomas higher
- 1990s: Thiago #5415, Thomas #28 — Thomas higher
- 2000s: Thiago #2442, Thomas #43 — Thomas higher
- 2010s: Thiago #502, Thomas #55 — Thomas higher
- 2020s: Thiago #99, Thomas #42 — Thomas higher
Thomas stood higher in every recorded decade — 15 of 15.
Rank by decade
| Decade | Thiago | Thomas |
|---|---|---|
| 1880s | — | #10 |
| 1890s | — | #12 |
| 1900s | — | #11 |
| 1910s | — | #10 |
| 1920s | — | #11 |
| 1930s | — | #9 |
| 1940s | — | #8 |
| 1950s | — | #8 |
| 1960s | — | #10 |
| 1970s | — | #21 |
| 1980s | #4895 | #24 |
| 1990s | #5415 | #28 |
| 2000s | #2442 | #43 |
| 2010s | #502 | #55 |
| 2020s | #99 | #42 |
Average national rank across each decade. A dash means the name sat outside the recorded top of that decade.
Around the world
Thiago
Not charting outside the US.
Thomas
- Canada#10
- Scotland#21
- England & Wales#26
National statistics offices, latest published year.
The names themselves
Meaning, roots, sound and the people who carried each
Where each name comes from
Thiago
Ultimately from Hebrew Ya'aqov (Jacob), reached by way of "Saint James"
The immediate sense is straightforward: Thiago comes from Santiago, "Saint James." The older layer is where scholars divide. Ya'aqov has long been tied to Hebrew 'aqev, "heel" — the Genesis account has Jacob born gripping his twin's heel, which gives the traditional gloss "supplanter." Others read it as a shortened theophoric name, "may God protect." Both readings are seriously held.
Ya'aqov → Iakobos → Iacobus → Santiago / Tiago → Thiago
How it traveled
The name traveled a long road before it reached this spelling. Hebrew Ya'aqov became Iakobos in the Greek of the New Testament, then Iacobus in Latin, and from there splintered across Europe into James, Jacques, Giacomo and Jacob.
Thomas
twin
Aramaic te'oma, a twin. The Gospel of John glosses it with the Greek word for the same thing, Didymos, which is how the meaning is known with certainty rather than reconstructed. Nobody records whose twin he was.
te'oma → Thomas
How it traveled
The Nag Hammadi find changed the study of early Christianity. The Thomas text has no narrative, no crucifixion and no resurrection — only sayings, about half of which have parallels in the familiar Gospels and half of which do not — and scholars have argued ever since about whether it preserves early material or reworks it.
Where a reading is contested the note says so — this page does not turn a guess into a fact. The chain is each name's recorded forms, oldest first; the story is its opening, told in full on the name's own page.
Out loud, and in short
Thiago
tee-AH-go
Brazilian Portuguese softens the opening consonant to something closer to chee-AH-go; Spanish and English speakers generally say tee-AH-go. The h is silent in every version. Stress stays on the middle syllable throughout.
- Thi — The everyday clipped form in Brazilian Portuguese; informal, used by family and friends.
- Thiaguinho — The Portuguese diminutive in -inho, affectionate and informal; also carried as a stage name by Brazilian performers.
- Tiago — The standard Portuguese spelling, sometimes used as the casual form of Thiago and also a full given name in its own right.
- T — A single-initial nickname common on sports rosters and in American classrooms.
Thomas
TOM-us
Two syllables, stress on the first, with the th said as a plain t. French says it the same way; Spanish moves the weight to the second, to-MAS. The h has been silent in English for centuries.
- Tom — The default in English; plain, adult, and a full name in its own right for many men.
- Tommy — The warm form; also British army slang for an ordinary soldier.
- Tomas — The Spanish and Irish form, used as a formal version in those families.
Who has carried each name
Thiago
Thiago Silva (b. 1984) — Brazil's longtime captain and defensive great
Thomas
Thomas Edison (b. 1847) — Held over 1,000 patents, including the light bulb
Thomas Jefferson (b. 1743) — Wrote the Declaration of Independence
Thomas Paine (b. 1737) — His pamphlet Common Sense sparked a revolution
Source: Wikidata — the one source on this page that is not an official agency.
Is it right for you
The differences that decide it, laid out by what you want
Choose by what you want
Choose Thiago if you want…
- a name fewer children share#50 in 2025 — thiago will almost certainly be the only one in school
- a name on the way upup 118 places on the charts in five years
- a name with more sound in itThiago runs 3 syllables, Thomas 2
- a newer arrivalThiago entered the US charts in 1986
Choose Thomas if you want…
- a name most people already know#34 in 2025, 6,917 babies that year
- a name with fewer syllablesThomas is 2 syllables to Thiago's 3
- a name that charts abroad tooThomas is on the national lists of Canada, Scotland and England & Wales
- a long American recordThomas was already in use when US records began in 1880
Each line is a measured difference between the two names — a rank, a count, a recorded form — never a judgement of either. Save the one that answers your question; it lands on your shortlist.
The trade-offs, name by name
Thiago
Strengths
- Recognized across Portuguese, Spanish and English-speaking countries, with close relatives — Santiago, Tiago, James — in nearly every European language.
- A documented line back through Latin and Greek to Hebrew, tied to one of the best-known pilgrim destinations in Europe.
- Three syllables, stress in the middle, ending in an open vowel — it carries well when called across a room or a field.
To consider
- Two spellings are both correct in the Portuguese-speaking world — Thiago in Brazil, Tiago in Portugal. Expect the h to be dropped by people writing it from hearing it.
- The first consonant is said differently depending on who is speaking: chee- in Brazil, tee- in Spanish and English. Families often end up living with both.
- The name is climbing quickly in the US, so it will sound more familiar to a kindergarten teacher a decade from now than it does today.
Thomas
Strengths
- A meaning the source text states outright rather than leaving to be reconstructed.
- The same or nearly the same spelling in French, Spanish, Irish, Portuguese and German.
- Three short forms, one of which is a full name in its own right.
To consider
- It is one of the most given names in the English-speaking world and has been for centuries.
- Tom is what most people will use, so it is worth liking the short form.
- The phrase about doubting will be made at some point, usually as a joke.
Documented properties of each name — how it spells, travels and shortens — not opinions about the child.
How each is likely to age
Thiago
63%chance Thiago feels dated by 2040
Thiago 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.
Thomas
12%chance Thomas feels dated by 2040
Thomas has held the top-100 across 15 different decades — it has never depended on fashion, and names like that read the same at any age.
A reading of where each name sits on the long naming cycle — computed, not measured, and explained on the data page.
With your last name
Say both in full. The notes are facts about letters and sound — a rhyme, a shared initial, the monogram — not a verdict on either name.
Type a last name to hear Thiago and Thomas in full.
Weighing the whole shortlist? Run the full comparison — up to eight names with your last name, initials, classroom projections and a printable report.
Decide together
Nobody names a baby alone
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More head-to-heads
Same measures, different pair. Sixty more are dealt daily in the arena.
Lists that carry both names
Every list here names both Thiago and Thomas — the same style, ranked by the same records.
Thiago or Thomas — the short answers
- Which is more popular, Thiago or Thomas?
- Thomas, in 2025: Thomas ranked #34 with 6,917 babies; Thiago ranked #50 with 5,835 babies.
- Which name is rising faster, Thiago or Thomas?
- Thiago. Over the last five years Thiago moved up 118 places; Thomas moved up 11 places.
- Which is the older name, Thiago or Thomas?
- Thiago entered the US charts in 1986; Thomas was already in use when US records began in 1880. On the American record, Thomas is the older name.
- How many people are named Thiago and Thomas?
- About 35,000 people named Thiago are estimated to be alive in the US today. About 1,497,000 people named Thomas are estimated to be alive in the US today.
- Will there be other Thiagos or Thomass in the classroom?
- Thiago will almost certainly be the only one in school. Roughly 1 in 10 classrooms will have a child named Thomas.
US figures from the Social Security Administration, 1880–2025; international figures from national statistics agencies. Votes are battle voters on this site, not the birth record. Data & methodology
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