Words that come from Proto-Indo-European “oḱtṓw”

400 words across 82 languages descend from Proto-Indo-European oḱtṓw — including eight, ought, October, eighteen, aught, octave, oughtn't, Octavian.

See the etymology of oḱtṓw itself →

English (148)

Italian (24)

Catalan (23)

Dutch (21)

Latin (19)

Esperanto (18)

French (8)

Ancient Greek (6)

Danish (4)

Asturian (4)

Aragonese (4)

Ladin (4)

Faroese (4)

Czech (4)

Telugu (4)

Swedish (3)

Icelandic (3)

Irish (3)

Sanskrit (3)

Afrikaans (3)

Old Swedish (3)

Georgian (3)

Venetian (3)

Greek (3)

Latvian (3)

West Frisian (2)

Middle Dutch (2)

Old Dutch (2)

North Frisian (2)

Ido (2)

Tagalog (2)

Welsh (2)

Galician (2)

Slovak (2)

Translingual (2)

Breton (2)

Armenian (2)

Corsican (2)

Old Irish (2)

Sicilian (2)

Bulgarian (2)

Hungarian (2)

Manx (2)

Japanese (1)

Dutch Low Saxon (1)

Old High German (1)

German Low German (1)

Old Frisian (1)

Cornish (1)

Proto-Celtic (1)

Proto-Indo-European (1)

Elfdalian (1)

Yiddish (1)

Slovene (1)

Russian (1)

Rohingya (1)

Old Spanish (1)

Old Georgian (1)

Proto-Kartvelian (1)

Friulian (1)

Polish (1)

Romani (1)

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Proto-Tocharian (1)

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Westrobothnian (1)

Crimean Gothic (1)

Macedonian (1)

Hausa (1)

Marshallese (1)

Ukrainian (1)

Luxembourgish (1)

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Gothic (1)

Maori (1)

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Vilamovian (1)

Istriot (1)

Mirandese (1)