Head to head · Boys' names
Dax vs Dennis
#692 vs #707 in 2025
Dax is a whisker ahead (#692 vs #707 in 2025), but the curves point different ways: Dax is stepping back from its peak, Dennis is holding its place on the charts. On momentum, Dennis has the edge.
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, Dennis leads 3 measures of 6; Dax leads 2.
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 —, Dennis #125 — Dennis higher
- 1890s: Dax —, Dennis #164 — Dennis higher
- 1900s: Dax —, Dennis #189 — Dennis higher
- 1910s: Dax —, Dennis #202 — Dennis higher
- 1920s: Dax —, Dennis #178 — Dennis higher
- 1930s: Dax —, Dennis #90 — Dennis higher
- 1940s: Dax —, Dennis #19 — Dennis higher
- 1950s: Dax —, Dennis #23 — Dennis higher
- 1960s: Dax #2056, Dennis #40 — Dennis higher
- 1970s: Dax #836, Dennis #60 — Dennis higher
- 1980s: Dax #1623, Dennis #99 — Dennis higher
- 1990s: Dax #1813, Dennis #183 — Dennis higher
- 2000s: Dax #1153, Dennis #308 — Dennis higher
- 2010s: Dax #574, Dennis #483 — Dennis higher
- 2020s: Dax #544, Dennis #675 — Dax higher
Dennis stood higher in 14 of 15 decades; Dax took the 2020s.
Rank by decade
| Decade | Dax | Dennis |
|---|---|---|
| 1880s | — | #125 |
| 1890s | — | #164 |
| 1900s | — | #189 |
| 1910s | — | #202 |
| 1920s | — | #178 |
| 1930s | — | #90 |
| 1940s | — | #19 |
| 1950s | — | #23 |
| 1960s | #2056 | #40 |
| 1970s | #836 | #60 |
| 1980s | #1623 | #99 |
| 1990s | #1813 | #183 |
| 2000s | #1153 | #308 |
| 2010s | #574 | #483 |
| 2020s | #544 | #675 |
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.
Dennis
of Dionysus
The Greek Dionysios means belonging to Dionysus, and it was an ordinary Greek personal name before any Christian carried it. The god is not incidental to the name; he is its whole content.
Dionysios → Denis → Dennis
How it traveled
Early Christians took Greek names as they found them, and a great many of them were theophoric — built on a god. Dionysios, Apollonios, Hermas, Demetrios and Olympias all came into the church attached to Olympian gods and stayed.
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.
Dennis
DEN-iss
Two syllables with the weight at the front. French says duh-NEE with the final consonant silent, and Russian keeps the s.
- Den — Cut to one syllable; the standard everyday form in Britain.
- Denny — The affectionate form; a standing name of its own in America.
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 most people already know#692 in 2025, 393 babies that year
- a name past its most crowded yearsDax is stepping back from its peak
- a name with fewer syllablesDax is 1 syllable to Dennis's 2
- a newer arrivalDax entered the US charts in 1967
Choose Dennis if you want…
- a name fewer children share#707 in 2025 — dennis will almost certainly be the only one in school
- a name with more sound in itDennis runs 2 syllables, Dax 1
- a long American recordDennis was already in use when US records began in 1880
- a name that ages quietlyan estimated 12% chance of feeling dated by 2040, against 40% for Dax
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.
Dennis
Strengths
- Everyone can spell it and say it on first hearing.
- It has a form in French, Italian, Spanish, Russian and Polish.
- It has an unbroken run in American records from the first year they were kept.
To consider
- It is strongly associated with the middle of the twentieth century.
- One long-running comic strip has attached a particular boy to the name.
- Denis with one n is standard in France and will be written for you.
Documented properties of each name — how it spells, travels and shortens — not opinions about the child.
How each is likely to age
Dax
40%chance Dax feels dated by 2040
Dax 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.
Dennis
12%chance Dennis feels dated by 2040
Dennis has held the top-100 across 6 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 Dax and Dennis 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
Still torn between Dax and Dennis?
Put both to the vote.
One link to your partner, your parents, your sister. Each of them gets the two names, a one-tap answer and room to say why — and every reply lands in one place.
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More than two in the running? Settle it with a bracket or run the full comparison with your last name.
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 Dennis each sit in the library — alternatives in the same style, ranked by the same records.
Dax or Dennis — the short answers
- Which is more popular, Dax or Dennis?
- Dax, in 2025: Dax ranked #692 with 393 babies; Dennis ranked #707 with 381 babies.
- Which name is rising faster, Dax or Dennis?
- Neither is rising. Over the last five years Dax moved down 224 places; Dennis moved down 60 places.
- Which is the older name, Dax or Dennis?
- Dax entered the US charts in 1967; Dennis was already in use when US records began in 1880. On the American record, Dennis is the older name.
- How many people are named Dax and Dennis?
- About 11,500 people named Dax are estimated to be alive in the US today. About 422,000 people named Dennis are estimated to be alive in the US today.
- Will there be other Daxs or Denniss in the classroom?
- Dax will almost certainly be the only one in school. Dennis 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
Keep playing
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