🌍 How Rare Are You in Vietnam?
🇻🇳 Genetic Landscape of Vietnam
Vietnam's genetic profile reflects 4,000 years of Viet-Muong heritage with significant Chinese, Cham, Khmer, and highland ethnic minority influences. The country's 54 ethnic groups create far more diversity than surface appearances suggest. The Kinh majority (~86%) shows classic Southeast Asian traits, while highland peoples like the Hmong and Dao carry distinct genetic markers from Central Asian migration routes. O blood type dominance reflects deep Austroasiatic roots.
Naming compresses that diversity rather than displaying it. Roughly two in five people carry the surname Nguyễn, a concentration with few parallels anywhere, and the cause is political rather than genealogical: commoners adopted the reigning dynasty's name, and successive houses — Lý, Trần, Lê, then Nguyễn — stacked theirs onto the population. Because a family name therefore says almost nothing about a person, Vietnamese are addressed by their given name and lists are alphabetised by it, formal settings included. Tone marks carry the distinctions instead, which is why separate names collapse into an identical bare "Le" the moment a document is printed abroad. Highland communities follow entirely different rules again.
🐈 The year of the cat, and a Tết that moves
Vietnam computes its lunar calendar on its own standard time rather than China's. North Vietnam switched from UTC+8 to UTC+7 on 8 August 1967, and the south did the same in 1975. A lunar month begins at a new moon and the eleventh month has to contain the winter solstice, so an hour's difference can push either event across midnight — the solstice has fallen on 21 December in Hanoi while it was 22 December for Beijing. With the two halves on different clocks, North and South Vietnam celebrated Tết 1968 on different days.
Usually Tết and Chinese New Year land on the same date. In 1985 they did not: Vietnam's fell on 21 January, China's on 20 February. The animals differ as well — in the Vietnamese zodiac the cat holds the year the Chinese zodiac gives to the rabbit. So a birth year can carry one animal here and another in a Chinese almanac. See how rare is my birthday.
👁️ Eye Color
| Dark Brown | 95% |
| Brown | 4% |
| Other | 1% |
💇 Hair Color
| Black | 97% |
| Dark Brown | 2% |
| Other | 1% |
🩸 Blood Type
| O+ | 42% |
| B+ | 24% |
| A+ | 20% |
| AB+ | 5% |
| O- | 4% |
| B- | 2% |
| A- | 2% |
| AB- | 1% |
Trait frequencies on this page come from public and institutional datasets — see Data Sources.
🧮 Calculate Your Rarity in Vietnam
Pick your eye colour, hair colour and blood type. The calculator uses Vietnam's own figures from the tables above, not world averages.
This is an estimate, not a measurement. It multiplies three national frequencies as if they were independent, and they are not: eye and hair colour share pigmentation genes, so a combination that tends to run together, such as blue eyes with blonde hair, is more common than the multiplication suggests, while one that rarely does, such as blue eyes with black hair, is rarer. Blood type is independent of both. The frequencies are national averages from public datasets — see Data Sources.
That number describes the body you were born with. Fraeon, our other site, does the same arithmetic for the part you chose: the films, series, games, books, anime and manga you have actually finished. Start your log →
📋 Fifty-four is a decision with a date on it
The figure of 54 ethnic groups is an administrative list with a date on it. Vietnam's General Statistics Office — the same body that runs the Population and Housing Census, whose latest reference date is 1 April 2019 — set the list out in Decision No. 121-TCTK/PPCĐ of 2 March 1979. The office is now Cục Thống kê, under the Ministry of Finance. Fifty-four is the number that decision arrived at, not a number anyone found in the population.
A list has edges, and people do not always sit inside them. The Pa Kô are counted within the Tà Ôi, and Thừa Thiên Huế province has run a project to have them added to the national list in their own right. The Arem are counted within the Chứt. Whether the Nguồn are a distinct people is still unsettled — a 2004 workshop weighed putting them with the Mường, the Thổ or the Chứt, and some argued for a group of their own. So an ethnic breakdown for Vietnam is a set of categories a statistics office drew on a date — and can redraw.
🔤 Six tones, one bare spelling
Vietnamese marks six tones with five diacritics, and the mark is the whole word. Ma, mà, má, mả, mã and mạ are six separate words — ghost, but, cheek, grave, horse, rice seedling. Take the marks off and all six are “ma”. The alphabet adds seven modified letters as well, ă â ê ô ơ ư and đ, and marks can stack twice on one letter, as in nhất, “first”. Chữ Quốc ngữ was enforced as the official script by the French colonial administration in 1910.
This is load-bearing for anything that counts names. A passport's machine-readable zone carries only the digits, the 26 capital letters A–Z and a filler character, so diacritics on Latin letters are simply omitted — ê becomes E, đ becomes D — and plenty of other systems do the same. Names that are not the same name arrive at the far end identical. A name-frequency count run on bare spellings merges distinct names and reports each of them as more common than it is — worth knowing before you read any figure on name rarity.
⭐ Rare Facts About Vietnam
Where the numbers on this page come from
Population comes from the National Statistics Office (Cục Thống kê, formerly the General Statistics Office) and its census, reference date 1 April 2019. The blood-group shares are the National Institute of Hematology and Blood Transfusion's figures: roughly O 45%, B 30%, A 20%, AB 5%, with Rh(D)-negative under 0.1%. The 168.1 cm height comes from a 2019–2020 nutrition survey run by the National Institute of Nutrition and the General Statistics Office and released by the Ministry of Health; it rests on a sample of around 22,400 households across 25 provinces and cities, so it is a survey figure, not a count. We could find no Vietnamese official source that records eye or hair colour, so those two percentages are assumptions the calculator uses, not measured data. Last checked September 2026.