Where does “Nachtschwärmer” come from?

Nachtschwärmer (German) comes from German Schwärmer, 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).

Nachtschwärmer (German): night owl, person awake at night, especially one who goes out, a nocturnal reveller

Definitions

  1. night owl, person awake at night, especially one who goes out, a nocturnal reveller

Ancestry of “Nachtschwärmer”, step by step

Nachtschwärmer traces back through two separate lines of ancestry.

via German Schwärmer

StepLanguageWordMeaning
1GermanSchwärmeragent noun of schwärmen; enthusiast, zealot,...
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 nacht

StepLanguageWordMeaning
1Germannachtnight
2Middle High Germannahtnight
3Old High Germannahtnight
4Proto-West Germanicnahtnight
5Proto-Germanicnahtsnight
6Proto-Indo-Europeannókʷtsnight
7Proto-Indo-Europeannegʷ-bare, naked
Every word from Proto-Italic *-āziosEvery word from Latin -āriusEvery word from German -er