UrsprungFrom Latin butyrum (“butter”) + -an.
Formerbutan(indefinite, nominative, singular) · butans(genitive, indefinite, singular) · butanet(definite, nominative, singular) · butanets(definite, genitive, singular) · -(indefinite, nominative, plural) · -(genitive, indefinite, plural) · -(definite, nominative, plural) · -(definite, genitive, plural)