Head to head · Boys' names
Kenzo vs Sincere
#628 vs #628 in 2025 · both holding its place on the charts
Kenzo and Sincere share the same spot on the 2025 charts (#628). The records cannot split them; sound and story will.
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, Kenzo leads 2 measures of 6; Sincere leads 1.
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
- 1920s: Kenzo #3991, Sincere — — Kenzo higher
- 1930s: Kenzo #3642, Sincere — — Kenzo higher
- 1970s: Kenzo —, Sincere #5587 — Sincere higher
- 1980s: Kenzo #6486, Sincere — — Kenzo higher
- 1990s: Kenzo #8285, Sincere #5844 — Sincere higher
- 2000s: Kenzo #5439, Sincere #718 — Sincere higher
- 2010s: Kenzo #1436, Sincere #625 — Sincere higher
- 2020s: Kenzo #570, Sincere #595 — Kenzo higher
The decades split evenly, 4 each; Kenzo took the 2020s.
Rank by decade
| Decade | Kenzo | Sincere |
|---|---|---|
| 1920s | #3991 | — |
| 1930s | #3642 | — |
| 1970s | — | #5587 |
| 1980s | #6486 | — |
| 1990s | #8285 | #5844 |
| 2000s | #5439 | #718 |
| 2010s | #1436 | #625 |
| 2020s | #570 | #595 |
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
Kenzo
Commonly "strong/healthy" or "wise" plus "three" — often marking a third son
In Japanese the meaning is decided by the characters, not the sound. Kenzo is written many ways: 健三 with 健 "healthy, strong," 賢三 with 賢 "wise," 憲三 with 憲 "law," 建三 with 建 "to build." The final 三 means "three" and traditionally marked a third son, though it has long been used without that literal sense. Other spellings end in 蔵 or 造 instead. All are genuine Kenzos; no single reading owns the name.
How it traveled
The name is Japanese, and its structure is a very old pattern there: a meaningful first character joined to a number, so that the written form tells you something the spoken form does not. Romanized as Kenzo (properly Kenzō, with a long final vowel), it traveled outward in the twentieth century with Japanese emigration and with the people who carried it — among them the architect Kenzo Tange and the designer Kenzo Takada, who founded his Paris fashion house under the single name in 1970.
Sincere
sincere, genuine, honest
The English word comes through French from Latin sincerus, 'pure, whole, unmixed.' The charming old explanation that it means 'without wax' — sine cera, of unadulterated honey or unpatched marble — is folk etymology, not linguistics; scholars trace the first part to a root meaning 'one, single' instead.
sincerus (Latin) → sincère (French) → sincere (English) → Sincere
How it traveled
The word entered English in the sixteenth century from Latin sincerus by way of French, first describing things that were pure or unmixed and only later describing people who meant what they said. As a given name it is much younger: Sincere is an American creation, part of a long national appetite for naming children after qualities rather than ancestors — a line that runs from the Puritan Patience and Verity to the modern Justice, King and Messiah.
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
Kenzo
KEN-zoh
Two syllables, stress on the first in American English. In Japanese the syllables are more evenly weighted and the final vowel is held longer — Ken-zoh-oh — which is what the macron in Kenzō marks. English speakers get it right on the first try either way.
- Ken — The obvious English short form, and a long-standing given name in its own right in both English and Japanese.
- Kenny — Informal, mostly used by family and in early childhood; also stands alone as a given name.
- Kenz — Casual and modern, mostly among peers rather than adults.
- Zo — Informal clipping from the back of the name; also heard as a short form of Alonzo and Enzo.
Sincere
sin-SEER
Two syllables, stress on the second — exactly as the everyday word is said. No one who reads English will need to be taught it.
Is it right for you
The differences that decide it, laid out by what you want
Choose by what you want
Choose Kenzo if you want…
- a name holding steadyKenzo is holding its place on the charts
- plenty of nickname options4 recorded short forms — Ken, Kenny and Kenz
Choose Sincere if you want…
- a name that stays wholeno recorded short form for Sincere
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
Kenzo
Strengths
- Spelled exactly as it sounds in English, so it survives phone calls, forms and roll calls without correction.
- Ken and Kenny are ready-made short forms already familiar to English speakers, with Kenz and Zo available too.
- Works in both Japanese and English without adjustment — useful for a family living across the two.
To consider
- The English spelling drops the long vowel of Kenzō. If Japanese-speaking family matter to you, decide early which characters the name is written with, since that — not the romanization — is what carries the meaning.
- Kenzo is also a well-known Paris fashion label and fragrance line, so some adults will hear the brand before the name. It fades fast in a child's own social world, but it will come up.
- Because most American Kenzos are very young, older adults may not have met one before and will occasionally ask you to repeat it. One clear saying is usually enough.
Sincere
Strengths
- The spelling is one every English reader already knows, so it survives forms, rosters and spelling bees without correction.
- The meaning needs no explanation and no translation — it is simply the word, in plain sight.
- Pronunciation is fixed by the dictionary, which removes the usual round of 'how do you say it?'
To consider
- The first syllable, said alone or clipped by a classmate, is 'sin.' It is the most likely source of teasing, and worth saying out loud a few times before deciding.
- Virtue names carry an implied standard, and children notice. Some wear it lightly; others get told they aren't living up to it, usually by someone being funny.
- There is no established short form, so the full two syllables will do most of the work — fine for a name this short, but there is no ready fallback.
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 Kenzo and Sincere 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 Kenzo and Sincere?
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 Kenzo and Sincere — the same style, ranked by the same records.
Kenzo or Sincere — the short answers
- Which is more popular, Kenzo or Sincere?
- They tie in 2025: Kenzo ranked #628 with 445 babies; Sincere ranked #628 with 445 babies.
- Which name is rising faster, Kenzo or Sincere?
- Neither is rising. Over the last five years Kenzo moved down 80 places; Sincere moved down 26 places.
- Which is the older name, Kenzo or Sincere?
- Kenzo entered the US charts in 1920; Sincere entered the US charts in 1976. On the American record, Kenzo is the older name.
- How many people are named Kenzo and Sincere?
- About 4,600 people named Kenzo are estimated to be alive in the US today. About 10,000 people named Sincere are estimated to be alive in the US today.
- Will there be other Kenzos or Sinceres in the classroom?
- Kenzo will almost certainly be the only one in school. Sincere 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 Kenzo, Sincere and the rest of your shortlist with your last name in one printable report.
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