Where does “fiagaire” come from?

fiagaire (Irish) comes from Irish -aire, from Old Irish -aire, from Old French -aire, from Latin -ārius, from Proto-Italic *-āzios — Forms relational adjectives to nouns (and rarely numerals).

Ancestry of “fiagaire”, step by step

Step	Language	Word	Meaning
1	Irish	-aire	-er, -or
2	Old Irish	-aire	Agentive affix, similar to English -er, -or
3	Old French	-aire	—
4	Latin	-ārius	er
5	Proto-Italic	*-āzios	Forms relational adjectives to nouns (and rarely numerals)

Every word from Proto-Italic *-āzios →