English
one
One comes from Old English ān ‘one’, from Proto-Germanic *ainaz ‘one’, and ultimately from Proto-Indo-European *h₁óynos ‘single, one’.
- Proto-Indo-Europeanc. 4500–2500 BCE*h₁óynos1‘single’reconstructed
- Proto-Germanicc. 500 BCE–200 CE*ainaz1‘one’reconstructed
- Proto-West Germanicc. 200–500 CE*ain1‘one’reconstructed
- Old Englishc. 450–1150ān1‘one’
- Middle Englishc. 1150–1500oon1
- Englishearliest quotation 1609one1
attested reconstructed ? uncertain or disputed deepest recorded ancestor
- 1 Wiktionary, English one
- Earliest quotation in Wiktionary’s entry: 1609, William Shakespeare, Sonnet 6: “Which happies thoſe that pay the willing lone; /…”.
Lineage
- Proto-Indo-Europeanc. 4500–2500 BCE*h₁óynosWiktionary, English one‘single’reconstructed
- Proto-Germanicc. 500 BCE–200 CE*ainazWiktionary, English one‘one’reconstructed
- Proto-West Germanicc. 200–500 CE*ainWiktionary, English one‘one’reconstructed
- Old Englishc. 450–1150ānWiktionary, English one‘one’
- Middle Englishc. 1150–1500oonWiktionary, English one
- Englishearliest quotation 1609oneWiktionary, English one. Earliest quotation in Wiktionary’s entry: 1609, William Shakespeare, Sonnet 6: “Which happies thoſe that pay the willing lone; /…”
The story
The use as an indefinite personal pronoun may have been influenced by unrelated French on, although the Germanic languages widely use cognates for the same sense (usually in non-subject function, but also in subject function.
Word family
English words that share an ancestor with one, grouped by the ancestor they share, most familiar first.
through Proto-Indo-European *ís ‘this, he’
- id ← is ← *is
- universally ← universal ← universel ← ūniversālis ← ūniversus
- yonder ← ġeonre ← *jainar ← *jainaz
- yon ← ġeon ← *jain ← *jainaz
through Proto-Indo-European *h₁óynos ‘single, one’
through Proto-Germanic *ainaz
- no ← nān ← *nain ← *nainaz
46 more relatives in the full family tree
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Today it means
num The number represented by the Arabic numeral 1; the numerical value equal to that cardinal number.
Sources
Sources: Wiktionary, “one”. By Wiktionary contributors, CC BY-SA 4.0, via kaikki.org (dump of Oct 3 2026); text adapted and restructured. Language periods are conventional ranges, not dates for this word. License.