J-O
org · Latin script
Recorded as a male name· opposite-gender records fall within measured source noise
J-O is a name written in the Latin script, with more bearers in the United States than in any other country. In Cape Verde it is the 91st most common given name. Recorded meaning: From Old Norse jór, from Proto-Germanic *ehwaz.
- BEBelgium≈1 in 1.4K(inferred from the name graph)
- AUAustralia≈1 in 1.4K
- NZNew Zealand≈1 in 1.5K
carrying the name, as counted by its national register where one exists and as Mondonomo estimates it elsewhere (marked ≈ and "est." on hover). One hue, darker where it is more common; hover a country for its figure.
- United States (measured from records)
- #576 (measured from records)
- Sources
- 549 (measured from records)
- ≈1 in 1.4K (inferred from the name graph)
57,903 people, 2020
of 15M given names
Highest-authority source
Belgium, est.
measured from records inferred from the name graph
Spellings & scripts(measured from records)
One other spelling is counted as the same name:
Locally spelled Jo in US United States, GB United Kingdom, AU Australia and 6 more.
Spellings marked ● are how people bearing the name write it in our records, and ○ marks a model's transliteration; click a spelling to open its page.
Meaning & origin(measured from records)
- Old Norsejór(measured from records)
- Proto-Germanic*ehwaz(measured from records)
From Old Norse jór, from Proto-Germanic *ehwaz.
Sources 4
- Dictionary of American Family Names
- Wiktionary
- Nordic Names
- Trask, Etymological Dictionary of Basque (2008 posthumous draft)
Where in the world(measured from records)
J-O counted together with the spellings and other-language forms grouped with it. Where a register counted another spelling, the row names it.
Sorted by bearers: national registers' counts, and Mondonomo's estimates (≈, est.) where no register counts.
| Country | Most common spelling | Sources | ||||
|---|---|---|---|---|---|---|
| US United States | #250 | 57,903 | 1 in 5.7K | 55K | Jo | 549 |
| GB United Kingdom | #259 | ≈32,000 est. | ≈1 in 2.1K | 4 | Jo | 334 |
| PH Philippines | #644 | ≈18,000 est. | ≈1 in 5.9K | — | Jo | 134 |
| AU Australia | #226 | ≈18,000 est. | ≈1 in 1.4K | 3 | Jo | 234 |
| CA Canada | #287 | ≈9,500 est. | ≈1 in 4K | 1 | Jo | 211 |
| BE Belgium | #446 | ≈8,700 est. | ≈1 in 1.4K | 7 | Jo | 125 |
| NZ New Zealand | #161 | ≈3,300 est. | ≈1 in 1.5K | 10 | Jo | 145 |
| NO Norway | #448 | 2,271 | 1 in 2.4K | 6.4K | Jo | 92 |
| CV Cape Verde | #91 | ≈200 est. | ≈1 in 2.9K | — | Jo | 6 |
57,903 people counted by Census Bureau — First Name Frequency 2020 by sex, 2020. Exact figures are national registers' own counts, while figures marked ≈ and est. are Mondonomo’s estimates, counted from our sources and calibrated against those registers; hover one for how far to trust it in that country. A dash means neither exists.
Registers cited: Census Bureau — First Name Frequency 2020 by sex; NRS — Baby names Scotland full list (1974–present); Australian national given names (aggregated state BDM); Alberta Open Government — Frequency and Ranking of Baby Names by Year and Gender; DIA — Baby name popularity (1900–present); SSB PxWebApi — Persons/Last names by year (StatBank tables 10501/12891); SSB — Navnesøk (name-search service, living population); Familienaam.be — Belgian family-name frequency (population register). Figures without a register are Mondonomo estimates; see Methodology.
Country figures for a list of names, at full precision, are available under licence rather than by scraping this table (how that works).
Evidence(measured from records)
No register attests this spelling yet
Frequently asked questions
- What does the name J-O mean, and where does it come from?
- From Old Norse jór, from Proto-Germanic *ehwaz. Recorded by Dictionary of American Family Names and Wiktionary and 2 other sources.
- In which country does J-O have the most bearers?
- In the United States, the national register counted about 58 thousand people named J-O, more than in any other country we hold, where it is most often spelled jo.
- How common is the name J-O?
- In the United States, the national register counted 57,903 people named J-O in 2020, about 1 in 5.7 thousand residents.
- How common is J-O compared with other names?
- In the United States, J-O is the 250th most common given name of 2,815,431 given names recorded there.
What do you want to know about J-O?
Nobody replies to these one by one, but what readers ask decides what these pages answer next.
Query this name via API
curl -H "X-API-Key: YOUR_KEY" https://api.mondonomo.ai/api/v1/name-graph/j-oThe payload this page is built from: spellings and scripts, countries and languages, related names, and the registers that attest the form. It takes a free API key (1,000 requests a day), which returns what this page shows everyone; the full country table, every register citation and the year-by-year series come with a licensed key, as does bulk access.
About this data
measured from records inferred from the name graph machine-generated
These figures come from the data snapshot of and will change as it is rebuilt.
Statistics are aggregated from the Mondonomo name corpus; related names and etymology are inferred from the name graph; pronunciation and any machine-marked transliterations are model-generated. Read how the numbers are made, including their known failure modes, and where the data comes from.
Reference works we consult — surname dictionaries, official name registers, Wikidata and Wiktionary — are named directly, beside the claims they support. The per-country source counts also include datasets of person records: we publish how many there are and their authority tier, but not their names.
Cite this page Mondonomo, “J-O” — the 250th most common given name in United States. Data snapshot 2026-10-10.