Head to head · Girls' names
Kathryn vs Keilani
#729 vs #727 in 2025
Keilani is a whisker ahead (#727 vs #729 in 2025), but the curves point different ways: Keilani is holding its place on the charts, Kathryn 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: Kathryn and Keilani 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
- 1880s: Kathryn #93, Keilani — — Kathryn higher
- 1890s: Kathryn #90, Keilani — — Kathryn higher
- 1900s: Kathryn #84, Keilani — — Kathryn higher
- 1910s: Kathryn #66, Keilani — — Kathryn higher
- 1920s: Kathryn #83, Keilani — — Kathryn higher
- 1930s: Kathryn #108, Keilani — — Kathryn higher
- 1940s: Kathryn #70, Keilani — — Kathryn higher
- 1950s: Kathryn #55, Keilani — — Kathryn higher
- 1960s: Kathryn #91, Keilani — — Kathryn higher
- 1970s: Kathryn #89, Keilani #5030 — Kathryn higher
- 1980s: Kathryn #50, Keilani #7818 — Kathryn higher
- 1990s: Kathryn #76, Keilani #5145 — Kathryn higher
- 2000s: Kathryn #137, Keilani #2299 — Kathryn higher
- 2010s: Kathryn #337, Keilani #1489 — Kathryn higher
- 2020s: Kathryn #648, Keilani #700 — Kathryn higher
Kathryn stood higher in every recorded decade — 15 of 15.
Rank by decade
| Decade | Kathryn | Keilani |
|---|---|---|
| 1880s | #93 | — |
| 1890s | #90 | — |
| 1900s | #84 | — |
| 1910s | #66 | — |
| 1920s | #83 | — |
| 1930s | #108 | — |
| 1940s | #70 | — |
| 1950s | #55 | — |
| 1960s | #91 | — |
| 1970s | #89 | #5030 |
| 1980s | #50 | #7818 |
| 1990s | #76 | #5145 |
| 2000s | #137 | #2299 |
| 2010s | #337 | #1489 |
| 2020s | #648 | #700 |
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
Kathryn
unknown, though long read as pure
The oldest form of the name is Greek and its meaning has never been recovered — it may not be Greek at all, and the earliest spellings do not contain a th. What happened is that medieval scholars connected it to katharos, the Greek word for clean or pure, and rewrote the spelling to match the etymology they preferred. The letter stayed and the etymology did not survive scrutiny. Kathryn preserves that mistake faithfully while dropping the ending that would show where the name actually came from.
a Greek name of unrecovered meaning → medieval scholars insert a th to match a preferred etymology → Katherine, Catherine and Katharine in English use → Kathryn appears as an American contraction → an American peak at the middle of the century
How it traveled
Kathryn Bigelow spent twenty years making films about men doing dangerous work — surfers robbing banks, a bomb disposal team in Iraq — before becoming the first woman to win the Academy Award for directing, in a year when the film she beat was made by her former husband. She had trained as a painter and come to film through the art world, and she has been consistently uninterested in being described as a woman director, which is a position she has had to restate in nearly every interview she has given since.
Keilani
the second element is lani, Hawaiian for 'sky, heaven, royal'; the first is read more than one way
Lani is settled and appears in dozens of Hawaiian names. The opening syllable is where readings diverge: some take it as kei, 'glory, dignity, splendor', giving something like 'heavenly glory'; others treat Keilani as a variant of Kailani, from kai, 'sea', giving 'sea and sky'. Both readings are defensible, and the name is short enough that either one fits it comfortably.
How it traveled
The building block here is old: lani carries the sense of sky, heaven and royalty in Hawaiian, and it closes a whole line of names — Leilani, Kalani, Noelani, Iolani among them. Hawaiian names traveled into wider American use across the twentieth century, Leilani leading the way through songs and film, and the -lani ending became familiar far from the islands.
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
Kathryn
KATH-rin
Two syllables in American speech, where Katherine usually has three. That compression is what the spelling records: the ending was already being swallowed, and Kathryn simply wrote down what people were saying.
- Kate — The oldest and steadiest short form, and a complete name for at least three centuries.
- Kathy — The mid-century American form, closely dated to the years the full name peaked.
- Kit — An old English short form, unisex, and much rarer than it deserves to be.
- Rin — Available only in this spelling, and modern in a way the rest are not.
Keilani
kay-LAH-nee
In Hawaiian, ei is said like the ay in day, and every vowel gets its own beat. English speakers seeing it cold often try KEE-lah-nee or KYE-lah-nee, so expect to correct it now and then; once heard, it usually sticks.
- Lani — The most natural short form, and a given name in its own right in Hawaii and beyond.
- Kei — Informal, taken from the first syllable; often written Kay by people who have only heard it.
- Kiki — An affectionate family nickname rather than anything anyone would write down.
- Lanie — A softened, mostly American form of Lani, used within families.
Is it right for you
The differences that decide it, laid out by what you want
Choose by what you want
Choose Kathryn if you want…
- a name past its most crowded yearsKathryn is stepping back from its peak
- a name with fewer syllablesKathryn is 2 syllables to Keilani's 3
- a long American recordKathryn 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 Keilani
Choose Keilani if you want…
- a name on the way upup 28 places on the charts in five years
- a name with more sound in itKeilani runs 3 syllables, Kathryn 2
- a newer arrivalKeilani entered the US charts in 1975
- a name that feels very nowKeilani is holding its place on the charts
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
Kathryn
Strengths
- It offers the largest set of usable short forms of almost any English name — Kate, Kathy, Kit, Katie.
- It has been in continuous use for eight hundred years without ever becoming a costume.
- The spelling is distinctly American and distinctly twentieth-century while the name itself is neither.
To consider
- There are at least six accepted spellings of this name and she will spell hers out every time.
- The compressed form is closely associated with the middle of the last century in a way the fuller spellings are not.
- The meaning everybody will tell her — pure — is an old mistake rather than a fact.
Keilani
Strengths
- Recognizable by association: the -lani ending is already familiar in the US through Leilani and Kalani, so the name rarely sounds unplaceable.
- Has a genuine, widely used short form in Lani, which also works as a standalone name.
- Every syllable is pronounced as written once the ay sound of ei is known — no silent letters, no hidden stress.
To consider
- Keilani, Kailani, Kalani and Keilana all circulate at once, so a child will spend a fair amount of life spelling it out and hearing the near-misses back.
- First encounters often produce KEE-lah-nee rather than kay-LAH-nee. Easy to fix, but it happens repeatedly, especially in writing-first situations like roll calls and appointments.
- It is a Hawaiian name with real cultural weight behind the lani element, which some families outside Hawaii want to think about before choosing it.
Documented properties of each name — how it spells, travels and shortens — not opinions about the child.
How each is likely to age
Kathryn
12%chance Kathryn feels dated by 2040
Kathryn has held the top-100 across 11 different decades — it has never depended on fashion, and names like that read the same at any age.
Keilani
40%chance Keilani feels dated by 2040
Keilani 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 Kathryn and Keilani in full.
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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 these names appear on
- Midcentury modern: tomorrow's comeback bets
- Science-fiction names in real use
- Names that belong entirely to the 1950s
- The names with the most spellings
- all guides
Where Kathryn and Keilani each sit in the library — alternatives in the same style, ranked by the same records.
Kathryn or Keilani — the short answers
- Which is more popular, Kathryn or Keilani?
- Keilani, in 2025: Keilani ranked #727 with 383 babies; Kathryn ranked #729 with 381 babies.
- Which name is rising faster, Kathryn or Keilani?
- Keilani. Over the last five years Kathryn moved down 204 places; Keilani moved up 28 places.
- Which is the older name, Kathryn or Keilani?
- Kathryn was already in use when US records began in 1880; Keilani entered the US charts in 1975. On the American record, Kathryn is the older name.
- How many people are named Kathryn and Keilani?
- About 321,000 people named Kathryn are estimated to be alive in the US today. About 5,300 people named Keilani are estimated to be alive in the US today.
- Will there be other Kathryns or Keilanis in the classroom?
- Kathryn will almost certainly be the only one in school. Keilani 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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