чужанин (Russian) comes from Russian чужо́й, from Proto-Slavic ťuďь, from Gothic 𐌸𐌹𐌿𐌳𐌰, from Proto-Germanic þeudō, from Proto-Indo-European tewtéh₂, from Proto-Indo-European tewh₂- — to swell; to crowd; to be strong.
чужанин (Russian): stranger