Where does “Galler” come from?

Galler (Turkish) comes from French pays de Galles, from French dé, from Middle French de, from Old French dé, from Latin dē, from Latin post, from Latin poste, from Proto-Italic posti — afterwards, post; by, at.

Ancestry of “Galler”, step by step

StepLanguageWordMeaning
1Frenchpays de Galles
2Frenchdie; diced slice; thimble
3Middle Frenchdeof; from
4Old Frenchdie
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