nous.

Inherited from Middle French nous, from Old French nous, nos, from Latin nōs, from Proto-Italic *nōs. In several dialects of French, je may be used instead of nous (j'allons instead of nous allons, je voyons instead of nous voyons etc.), this use was perceived as peasant-like and thus often mocked since the 15th century (for example by Molière). However this use survived and spread in various regions of the so-called domaine d'oïl (linguistic area starting above Auvergne where the oïl varieties of Romance developed from the 4th or 5th century). The regions of France where this use of je (from Latin ego "I") instead of nous, nos (from Latin nos, "we") was recorded are Normandy, Romance-speaking Brittany, Poitou and Anjou, Champagne, Ardennes, Bourgogne and Franche-Comté, Dauphiné, Berry, Touraine, Orléanais, Bourbonnais, Maine. See cognates in regional languages in France: Angevin je and nous, Bourbonnais-Berrichon je and nous, Bourguignon i and nous, Champenois ju and nous, Franc-Comtois i and nôs, Gallo je and nouz, Lorrain nos, Norman je and nos, Orléanais je and nous, Picard nos, Poitevin-Saintongeais i/jhe and nous, Franco-Provençal nos, Occitan nosautres (Provençal nousautes), Catalan nosaltres, Corsican noi.

From Ancient Greek νοῦς (noûs) or νόος (nóos, “mind”).