Where does “глухарь” come from?

глухарь (Russian) comes from Russian -а́рь, from Proto-Slavic -ařь, from Gothic -𐌰𐍂𐌴𐌹𐍃, from Proto-Germanic -ārijaz, from Latin -ārius, from Proto-Italic *-āzios.

глухарь (Russian): western capercaillie, wood grouse, mountain cock,...