Etymograph

English

thirty

Thirty comes from Middle English thirty, and goes back to Proto-Germanic *þrīz tigiwiz.

  1. Proto-Germanicc. 500 BCE–200 CE*þrīz tigiwiz1literally ‘three tens’reconstructed
  2. Old Englishc. 450–1150þrītiġ1
  3. Middle Englishc. 1150–1500thirty1
  4. Englishearliest quotation 2009thirty1

attested reconstructed ? uncertain or disputed deepest recorded ancestor

  1. 1 Wiktionary, English thirty
  2. Earliest quotation in Wiktionary’s entry: 2009, Kenneth Davids, Convenience First: Espresso Pods and Capsules: “To conclude, here in tabular form is a summary…”.

Lineage

  1. Proto-Germanicc. 500 BCE–200 CE*þrīz tigiwizWiktionary, English thirtyliterally ‘three tens’reconstructed
  2. Old Englishc. 450–1150þrītiġWiktionary, English thirty
  3. Middle Englishc. 1150–1500thirtyWiktionary, English thirty
  4. Englishearliest quotation 2009thirtyWiktionary, English thirty. Earliest quotation in Wiktionary’s entry: 2009, Kenneth Davids, Convenience First: Espresso Pods and Capsules: “To conclude, here in tabular form is a summary…”

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Today it means

num The cardinal number occurring after twenty-nine and before thirty-one, represented in Arabic numerals as 30.

Sources

Sources: Wiktionary, “thirty”. 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.

Etymograph / Proto-Germanic *þrīz tigiwiz / thirty