Where does “schaner” come from?

schaner (Romansch) comes from Latin iānuārius, from Latin -ārius, from Proto-Italic *-āzios — Forms relational adjectives to nouns (and rarely numerals).

Ancestry of “schaner”, step by step

Step	Language	Word	Meaning
1	Latin	iānuārius	of January
2	Latin	-ārius	er
3	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 Latin iānuārius →