Where does “Nostalgikerin” come from?

Nostalgikerin (German) comes from Danish nostalgiker, from German -iker, 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 “Nostalgikerin”, step by step

StepLanguageWordMeaning
1Danishnostalgikernostalgic
2German-iker-ist, -ic
3German-erForms agent nouns etc. from verbs, suffixed to...
4Old High German-āriused to form agent nouns
5Proto-West Germanic-ārī-er
6Proto-Germanic-ārijaz-er
7Latin-āriuser
8Proto-Italic*-āziosForms relational adjectives to nouns (and rarely numerals)
Every word from Proto-Italic *-āzios