Head to head · Boys' names
Aidan vs Niko
#326 vs #325 in 2025
Niko is a whisker ahead (#325 vs #326 in 2025), but the curves point different ways: Niko is holding its place on the charts, Aidan 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
The tape is even: Aidan and Niko each lead 3 measures of 6.
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
- 1930s: Aidan #3549, Niko — — Aidan higher
- 1950s: Aidan #3311, Niko — — Aidan higher
- 1960s: Aidan #2985, Niko #4015 — Aidan higher
- 1970s: Aidan #2603, Niko #3719 — Aidan higher
- 1980s: Aidan #1558, Niko #3321 — Aidan higher
- 1990s: Aidan #444, Niko #890 — Aidan higher
- 2000s: Aidan #61, Niko #942 — Aidan higher
- 2010s: Aidan #173, Niko #614 — Aidan higher
- 2020s: Aidan #297, Niko #321 — Aidan higher
Aidan stood higher in every recorded decade — 9 of 9.
Rank by decade
| Decade | Aidan | Niko |
|---|---|---|
| 1930s | #3549 | — |
| 1950s | #3311 | — |
| 1960s | #2985 | #4015 |
| 1970s | #2603 | #3719 |
| 1980s | #1558 | #3321 |
| 1990s | #444 | #890 |
| 2000s | #61 | #942 |
| 2010s | #173 | #614 |
| 2020s | #297 | #321 |
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
Aidan
little fire
From Irish aodh, fire, with the diminutive ending -an. Aodh was also a divine name in the pre-Christian Irish material, and it survives in the surnames Mac Aodha and O hAodha, anglicized as McHugh, Magee and Mackay.
Aodh → Aodhan → Aedan → Aidan
How it traveled
Aodh is among the oldest recorded Irish names, and its diminutive belonged to the monk whom the king of Northumbria asked Iona to send him. He founded the monastery on Lindisfarne in the seventh century, and the English kept his name in the spelling Aidan.
Niko
victory of the people
From the Greek Nikolaos, built from nikē, 'victory', and laos, 'people'. Niko inherits the meaning of the full name it was clipped from.
Nikolaos → Nikolaus → Nikola → Niko
How it traveled
The parent name, Nikolaos, was in use in the Greek world well before the fourth century, when Nicholas of Myra became one of the most widely venerated saints in Christendom — the reason the name spread from Greece into Russia, Italy, Germany, France and eventually English. Everywhere it went, speakers cut it down: Nicholas to Nick, Nikolai to Kolya, Nikolaos to Nikos, Nikolaus to Niko.
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
Aidan
AY-dun
Two syllables, stress on the first. The Irish Aodhan is closer to AY-dawn, with a fuller second syllable than English gives it. The dh in the Irish spelling is silent; it marks a consonant that stopped being pronounced centuries ago.
- Aido — An Irish informal pattern that clips a name and adds -o; rarely used in American families.
- A.J. — Used where a middle name supplies the second initial; the name itself resists shortening.
Niko
NEE-koh
NEE-koh follows the Greek, Finnish and Slavic pronunciation and is the usual one in the US. Some English speakers reach for NIK-oh by analogy with Nick; both are heard, so it helps to say it once at introductions.
- Nik — The obvious further clip; also spelled Nick, which is the standard short form of Nicholas in English.
- Nico — Used interchangeably with Niko in Italian and German-speaking families, and a full given name on its own in both.
- Nikos — The Greek everyday form, used where the family has Greek ties rather than as a general nickname.
Is it right for you
The differences that decide it, laid out by what you want
Choose by what you want
Choose Aidan if you want…
- a name past its most crowded yearsAidan is stepping back from its peak
- a name that feels very nowAidan is stepping back from its peak
Choose Niko if you want…
- a name on the way upup 33 places on the charts in five years
- a name that ages quietlyan estimated 40% chance of feeling dated by 2040, against 77% for Aidan
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
Aidan
Strengths
- A documented seventh-century bearer and a fixed feast day, so the history is checkable rather than atmospheric.
- This is the Irish spelling, which settles the argument about which version is the original.
- Two syllables, stress on the first, and nobody needs to be told how to say it.
To consider
- Aiden, Ayden and Aden all exist, so this spelling will be corrected and re-corrected for life.
- It arrived alongside a large cohort of rhyming names and will be heard as one of them.
- The very few girls given the spelling will be read as boys on every form.
Niko
Strengths
- Complete as it stands — no long form to explain, though Nicholas, Nikola and Nikolai are all available if a fuller name is ever wanted.
- Recognized across Finnish, Greek, Croatian, Georgian, German and Italian speakers, with the same sound in each.
- Two syllables, spelled the way it sounds once the K is heard, and easy for a small child to say and write.
To consider
- Niko, Nico and Nikko all exist, and all three are in real use. Expect to spell it fairly often, and to see the other two come back at you in email and on forms.
- Many Americans will assume it is short for Nicholas and may ask for the 'real' name. That is easy to answer, but it will come up.
- The name's growth here is very recent, so a Niko will likely be the only one in his class while the name still reads as unfamiliar to older generations — a combination that suits some families and not others.
Documented properties of each name — how it spells, travels and shortens — not opinions about the child.
How each is likely to age
Aidan
77%chance Aidan feels dated by 2040
Aidan is coming down from a big peak (#39 in 2003). This is the stretch of the cycle where a name starts to sound like the decade it ruled.
Niko
40%chance Niko feels dated by 2040
Niko 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.
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 Aidan and Niko 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 Aidan and Niko?
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 Aidan and Niko — the same style, ranked by the same records.
Aidan or Niko — the short answers
- Which is more popular, Aidan or Niko?
- Niko, in 2025: Niko ranked #325 with 1,046 babies; Aidan ranked #326 with 1,043 babies.
- Which name is rising faster, Aidan or Niko?
- Niko. Over the last five years Aidan moved down 65 places; Niko moved up 33 places.
- Which is the older name, Aidan or Niko?
- Aidan entered the US charts in 1936; Niko entered the US charts in 1962. On the American record, Aidan is the older name.
- How many people are named Aidan and Niko?
- About 117,000 people named Aidan are estimated to be alive in the US today. About 14,500 people named Niko are estimated to be alive in the US today.
- Will there be other Aidans or Nikos in the classroom?
- Aidan will almost certainly be the only one in school. Niko 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
Sixty more head-to-heads are dealt in the arena every day — or line up Aidan, Niko and the rest of your shortlist with your last name in one printable report.
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