Head to head · Boys' names
Dax vs Tomas
#692 vs #691 in 2025
Tomas is a whisker ahead (#691 vs #692 in 2025), but the curves point different ways: Tomas is holding its place on the charts, Dax is stepping back from its peak.
Cast your vote
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, Tomas leads 6 measures of 6; Dax leads 0.
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: Dax —, Tomas #493 — Tomas higher
- 1890s: Dax —, Tomas #638 — Tomas higher
- 1900s: Dax —, Tomas #529 — Tomas higher
- 1910s: Dax —, Tomas #638 — Tomas higher
- 1920s: Dax —, Tomas #514 — Tomas higher
- 1930s: Dax —, Tomas #501 — Tomas higher
- 1940s: Dax —, Tomas #496 — Tomas higher
- 1950s: Dax —, Tomas #530 — Tomas higher
- 1960s: Dax #2056, Tomas #540 — Tomas higher
- 1970s: Dax #836, Tomas #497 — Tomas higher
- 1980s: Dax #1623, Tomas #478 — Tomas higher
- 1990s: Dax #1813, Tomas #474 — Tomas higher
- 2000s: Dax #1153, Tomas #500 — Tomas higher
- 2010s: Dax #574, Tomas #680 — Dax higher
- 2020s: Dax #544, Tomas #715 — Dax higher
Tomas stood higher in 13 of 15 decades; Dax has held the lead since the 2010s.
Rank by decade
| Decade | Dax | Tomas |
|---|---|---|
| 1880s | — | #493 |
| 1890s | — | #638 |
| 1900s | — | #529 |
| 1910s | — | #638 |
| 1920s | — | #514 |
| 1930s | — | #501 |
| 1940s | — | #496 |
| 1950s | — | #530 |
| 1960s | #2056 | #540 |
| 1970s | #836 | #497 |
| 1980s | #1623 | #478 |
| 1990s | #1813 | #474 |
| 2000s | #1153 | #500 |
| 2010s | #574 | #680 |
| 2020s | #544 | #715 |
Average national rank across each decade. A dash means the name sat outside the recorded top of that decade.
The names themselves
Meaning, roots, sound and the people who carried each
Where each name comes from
Dax
Not established
As a given name, Dax carries no established translation. What is documented is the source: Dax is a spa town in the Landes region of southwestern France, whose name traces back through the medieval form d'Acqs to the Roman settlement built around its hot springs, and it survives as a French surname. The English surname Dax is separate and of uncertain origin. None of that was attached to the first name as a meaning — it arrived as a sound and a surname, not as a word.
Dax (Gascon town) → Dax (French surname) → Dax (given name)
How it traveled
Dax is first of all a place: a town in Gascony known since Roman times for its thermal waters, and a surname carried by families from that corner of France. It reached American first names through print — Harold Robbins gave the hero of his 1966 novel The Adventurers the name Diego "Dax" Xenos, and the film that followed put the sound in front of a wider audience.
Tomas
twin
From Aramaic te'oma, 'twin'. The Gospel of John glosses the apostle's name with the Greek word Didymos, which means the same thing.
Te'oma (Aramaic) → Thomas (Greek) → Thomas (Latin) → Tomás / Tomáš → Tomas
How it traveled
The name begins in Aramaic as te'oma, 'twin', and reaches the wider world through the apostle called Thomas in the Gospels — the one the Greek text also names Didymos. Greek and Latin carried it across the Mediterranean, and medieval Christendom spread it into nearly every European language, where each one filed down a different edge: Thomas in England and France, Tommaso in Italy, Tomasz in Poland, Tomás in Spain, Portugal and Ireland.
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
Dax
DAKS
One syllable, rhyming with fax. There is no competing pronunciation in English, and the French town is said the same way.
- Dax — Already a full given name in its own right, and also the everyday short form for boys registered as Daxton.
- Daxy — A family diminutive, used mostly in the toddler years and rarely outside the house.
- D — The initial-only nickname common among teammates and school friends.
Tomas
TOH-mahs
English speakers usually stress the first syllable. In Spanish and Portuguese the accented form Tomás puts the stress on the second: toh-MAHS. Both are correct for their own language, so it helps to decide early which one your family will use.
- Tom — The universal short form across English and most European languages; also stands alone as a given name.
- Tommy — Informal and affectionate, common from childhood on; used as an independent given name too.
- Tomi — Informal, familiar in Spanish- and Lithuanian-speaking families.
- Tomasito — Spanish diminutive, used within families rather than at school or work.
- Also Tomy.
Is it right for you
The differences that decide it, laid out by what you want
Choose by what you want
Choose Dax if you want…
- a name past its most crowded yearsDax is stepping back from its peak
- a name with fewer syllablesDax is 1 syllable to Tomas's 2
- a newer arrivalDax entered the US charts in 1967
Choose Tomas if you want…
- a name on the way upup 16 places on the charts in five years
- a name with more sound in itTomas runs 2 syllables, Dax 1
- plenty of nickname options5 recorded short forms — Tom, Tommy and Tomi
- a long American recordTomas 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
Dax
Strengths
- One syllable, spelled the only way it sounds — almost nobody will need it repeated or corrected in writing.
- Needs no nickname and shrinks to nothing, so it reads the same on a kindergarten cubby and a work email.
- Identical in French, Dutch and English, with no respelling required when it crosses a border.
To consider
- It sits in a crowded sound family — Max, Jax, Pax, Zax — so it can be misheard on the phone or in a noisy classroom, and it may echo other boys' names in the same year group.
- The wave is recent and the bearers are overwhelmingly young, so for now the name reads as a child's name rather than one with adult company behind it.
- Rhyming with fax, tax and axe gives playground wordplay an easy hook, though the words themselves are harmless enough.
Tomas
Strengths
- Shortens to Tom and Tommy without any explanation needed anywhere in the English-speaking world.
- Works unchanged in Spanish, Portuguese, Czech, Lithuanian, Swedish and Norwegian — a rare thing for a name this short.
- A documented line running from Aramaic through Greek and Latin into nearly every European language.
To consider
- It will be written as Thomas by people who are not listening carefully — on forms, in emails, on class lists. Most bearers make peace with correcting it.
- The accent is a lifelong small decision: Tomás is standard in Spanish and Portuguese, but American systems drop diacritics constantly, so the two spellings will follow him around.
- Stress shifts between languages, so relatives may say the name differently from teachers. Families generally settle this by simply choosing one and repeating it.
Documented properties of each name — how it spells, travels and shortens — not opinions about the child.
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 Dax and Tomas 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
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More head-to-heads
Same measures, different pair. Sixty more are dealt daily in the arena.
Lists these names appear on
- Three-letter names: tiny and complete
- Names with an X in them
- Science-fiction names in real use
- Strong-sounding names with a hard edge
- all guides
Where Dax and Tomas each sit in the library — alternatives in the same style, ranked by the same records.
Dax or Tomas — the short answers
- Which is more popular, Dax or Tomas?
- Tomas, in 2025: Tomas ranked #691 with 394 babies; Dax ranked #692 with 393 babies.
- Which name is rising faster, Dax or Tomas?
- Tomas. Over the last five years Dax moved down 224 places; Tomas moved up 16 places.
- Which is the older name, Dax or Tomas?
- Dax entered the US charts in 1967; Tomas was already in use when US records began in 1880. On the American record, Tomas is the older name.
- How many people are named Dax and Tomas?
- About 11,500 people named Dax are estimated to be alive in the US today. About 25,000 people named Tomas are estimated to be alive in the US today.
- Will there be other Daxs or Tomass in the classroom?
- Dax will almost certainly be the only one in school. Tomas will almost certainly be the only one in school.
US figures from the Social Security Administration, 1880–2025. Votes are battle voters on this site, not the birth record. Data & methodology
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