Where does “Dufour” come from?

Dufour (Portuguese) comes from French Dufour, from French dû, from Old French deü, from Latin dēbēre, from Latin dē, from Latin post, from Latin poste, from Proto-Italic posti — afterwards, post; by, at.

Ancestry of “Dufour”, step by step

StepLanguageWordMeaning
1FrenchDufour
2Frenchwhat is owed, money's worth; past participle of...
3Old FrenchdeüAlternative form of deu
4Latindēbēre
5Latinof; concerning; about
6Latinpostbehind; after, since, besides, except; behind,...
7Latinposteablative singular of postis
8Proto-Italicpostibehind, after
9Proto-Indo-Europeanpóstiafter
10Proto-Indo-Europeanpósafterwards, post; by, at
Every word from Proto-Indo-European pósEvery word from Proto-Indo-European póstiEvery word from Proto-Italic posti