Where does “birdaro” come from?
birdaro (Esperanto) comes from Esperanto -aro, from Russian -а́рь, from Proto-Slavic -ařь, from Gothic -𐌰𐍂𐌴𐌹𐍃, from Proto-Germanic -ārijaz, from Latin -ārius, from Proto-Italic *-āzios.
birdaro (Esperanto): flock
Ancestry of “birdaro”, step by step