Where does “Nickerchen” come from?

Nickerchen (German) comes from German Nicker, 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).

Nickerchen (German): nap, catnap, snooze

Definitions

nap, catnap, snooze

Ancestry of “Nickerchen”, step by step

Step	Language	Word	Meaning
1	German	Nicker	nap
2	German	-er	Forms agent nouns etc. from verbs, suffixed to...
3	Old High German	-āri	used to form agent nouns
4	Proto-West Germanic	-ārī	-er
5	Proto-Germanic	-ārijaz	-er
6	Latin	-ārius	er
7	Proto-Italic	*-āzios	Forms relational adjectives to nouns (and rarely numerals)

Every word from Proto-Italic *-āzios →Every word from Latin -ārius →Every word from German -er →