Head to head · Boys' names
Cairo vs Jax
#341 vs #342 in 2025
Cairo is a whisker ahead (#341 vs #342 in 2025), but the curves point different ways: Cairo is holding its place on the charts, Jax 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, Cairo leads 4 measures of 6; Jax 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
- 1970s: Cairo #5355, Jax — — Cairo higher
- 1980s: Cairo #6302, Jax — — Cairo higher
- 1990s: Cairo #5913, Jax #3314 — Jax higher
- 2000s: Cairo #3191, Jax #1068 — Jax higher
- 2010s: Cairo #1133, Jax #251 — Jax higher
- 2020s: Cairo #334, Jax #284 — Jax higher
Jax stood higher in 4 of 6 decades; Jax has held the lead since the 1990s.
Rank by decade
| Decade | Cairo | Jax |
|---|---|---|
| 1970s | #5355 | — |
| 1980s | #6302 | — |
| 1990s | #5913 | #3314 |
| 2000s | #3191 | #1068 |
| 2010s | #1133 | #251 |
| 2020s | #334 | #284 |
Average national rank across each decade. A dash means the name sat outside the recorded top of that decade.
Around the world
Cairo
Not charting outside the US.
Jax
- Scotland#92
National statistics offices, latest published year.
The names themselves
Meaning, roots, sound and the people who carried each
Where each name comes from
Cairo
the victorious, the vanquisher
From Arabic al-Qāhira, the feminine form of al-Qāhir, 'the conqueror' — a name applied to the planet Mars in medieval Arabic astronomy and given to the new Fatimid capital at its founding.
al-Qāhir → al-Qāhira → Cairo (Italian) → Cairo
How it traveled
The city was established in the tenth century by the Fatimid dynasty as a royal capital beside older settlements on the Nile, and named al-Qāhira. European merchants and travelers carried the word home, and it reached English through Italian as Cairo — which is why the English form looks nothing like the Arabic.
Jax
Short form of Jackson, "son of Jack"
Jack has been the English pet form of John since the Middle Ages, and John comes from Hebrew Yochanan, "God is gracious." So the meaning runs through two links before it lands, but the chain itself is not in doubt. The x spelling belongs to the same modern family as Jaxon and Jaxson.
Yochanan → John → Jack → Jackson → Jax
How it traveled
The surname Jackson is old and thoroughly English — a patronymic formed from Jack, which stood in for John for centuries in everyday speech. American parents began moving surnames to the front of the name in large numbers, and Jackson came along with the rest; from there the clipped Jax followed naturally, helped by a broader taste for x endings that also produced Jaxon and Jaxson.
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
Cairo
KYE-roh
American English says the Egyptian capital KYE-roh, and that is the standard reading of the name. The Illinois and Georgia towns of the same spelling are pronounced KAY-roh, so an occasional correction is part of the deal.
- Cai — The most natural clipping; informal, and overlaps in sound with the independent given name Kai.
- Ro — Family-level nickname drawn from the second syllable; rarely used outside the household.
Jax
JAKS
One syllable, rhyming with packs. There is no second way to say it, in the US or elsewhere.
- Jax — Most often used the other way round: Jax is the everyday short form for boys registered as Jackson or Jaxon, and it also stands alone as the full legal name.
- Jaxy — Informal, mostly within families and mostly while a child is small.
- J — Informal, among friends and teammates; common with any J name.
Is it right for you
The differences that decide it, laid out by what you want
Choose by what you want
Choose Cairo if you want…
- a name on the way upup 7 places on the charts in five years
- a name with more sound in itCairo runs 2 syllables, Jax 1
Choose Jax if you want…
- a name past its most crowded yearsJax is stepping back from its peak
- a name with fewer syllablesJax is 1 syllable to Cairo's 2
- a name that charts abroad tooJax is on the national lists of Scotland
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
Cairo
Strengths
- The spelling needs no explanation — it is a world capital, so people who have never met the name still know how to write it.
- A documented meaning that goes back to the city's tenth-century founding: 'the victorious'.
- Two syllables, ending on an open vowel, which sits easily beside most one-syllable surnames.
To consider
- It is still first and foremost a city, so expect the occasional question about whether there is a family connection to Egypt, and the occasional assumption that there is.
- Two live pronunciations exist in American English — KYE-roh for the capital, KAY-roh for the towns in Illinois and Georgia. Most people default to the first, but not all.
- The wave of children with this name is very new, so a boy named Cairo will meet few older namesakes and, in most schools, no classmate sharing it.
Jax
Strengths
- One syllable and phonetically obvious — readable on sight by anyone, including people who have never met the name before.
- Already as short as it goes, so there is no nickname negotiation and no long form to defend.
- Pairs cleanly with Jackson or Jaxon on a birth certificate if you want a longer formal option in reserve.
To consider
- Said aloud it is indistinguishable from Jacks or Jack's, so expect to spell it over the phone and to see it written with a ck by well-meaning people.
- The name has no record before the last few decades and its wave is very recent, which means it reads as a marker of one particular stretch of years rather than as ageless.
- The exact spelling is uncommon, but the sound is not: Jackson, Jaxon, Jaxson and Jaxton are all nearby, so a Jax may still hear his name called across a playground and turn to find it was someone else.
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 Cairo and Jax 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 Cairo and Jax?
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 that carry both names
Every list here names both Cairo and Jax — the same style, ranked by the same records.
Cairo or Jax — the short answers
- Which is more popular, Cairo or Jax?
- Cairo, in 2025: Cairo ranked #341 with 965 babies; Jax ranked #342 with 961 babies.
- Which name is rising faster, Cairo or Jax?
- Cairo. Over the last five years Cairo moved up 7 places; Jax moved down 96 places.
- Which is the older name, Cairo or Jax?
- Cairo entered the US charts in 1979; Jax entered the US charts in 1995. On the American record, Cairo is the older name.
- How many people are named Cairo and Jax?
- About 9,400 people named Cairo are estimated to be alive in the US today. About 25,000 people named Jax are estimated to be alive in the US today.
- Will there be other Cairos or Jaxs in the classroom?
- Cairo will almost certainly be the only one in school. Jax will almost certainly be the only one in school.
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
Keep playing
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