Where does “Grauburgunder” come from?

Grauburgunder (German) comes from German Burgunder, from German -er, from Old High German -āri, from Proto-West Germanic -ārī, from Proto-Germanic -ārijaz, from Latin -ārius, from Proto-Italic *-āzios — Forms relational adjectives to nouns (and rarely numerals).

Ancestry of “Grauburgunder”, step by step

Grauburgunder traces back through two separate lines of ancestry.

via German Burgunder

StepLanguageWordMeaning
1GermanBurgunderBurgundian
2German-erForms agent nouns etc. from verbs, suffixed to...
3Old High German-āriused to form agent nouns
4Proto-West Germanic-ārī-er
5Proto-Germanic-ārijaz-er
6Latin-āriuser
7Proto-Italic*-āziosForms relational adjectives to nouns (and rarely numerals)

via German Grau

StepLanguageWordMeaning
1GermanGraugrey
2Middle High Germangrā
3Old High Germangrāogrey
4Proto-Germanicgrēwazgrey
5Proto-Indo-Europeanǵʰreh₁-to become green, grow; to grow; to green, to grow
Every word from Proto-Italic *-āziosEvery word from Latin -āriusEvery word from German -er