Where does “dunha” come from?

dunha (Galician) comes from Galician de, from Old Portuguese de, from Latin dē, from Latin post, from Latin poste, from Proto-Italic posti, from Proto-Indo-European pósti, from Proto-Indo-European pós — afterwards, post; by, at.

Ancestry of “dunha”, step by step

dunha traces back through two separate lines of ancestry.

via Galician de

StepLanguageWordMeaning
1Galiciandeof, from
2Old Portuguesedeof
3Latinof; concerning; about
4Latinpostbehind; after, since, besides, except; behind,...
5Latinposteablative singular of postis
6Proto-Italicpostibehind, after
7Proto-Indo-Europeanpóstiafter
8Proto-Indo-Europeanpósafterwards, post; by, at

via Galician unha

StepLanguageWordMeaning
1Galicianunhaa, one; one
2Old Portugueseũafeminine singular of ũu
3Latinunanominative/vocative feminine singular of ūnus;...
4Latinunusone, single; alone; one; 1
5Old Latinoinosone
6Proto-Italicoinoscardinal number 1 Previous: n/a Next: *duō;...
7Proto-Indo-Europeanóynosone; single
Every word from Proto-Indo-European pósEvery word from Proto-Indo-European póstiEvery word from Proto-Italic posti