Where does “Krzywonos” come from?

Krzywonos (Polish) comes from Polish nos, from Old Polish nos, from Proto-Slavic nȍsъ, from Proto-Balto-Slavic nasús, from Proto-Indo-European néh₂s- — nose, nostril.

Ancestry of “Krzywonos”, step by step

Krzywonos traces back through two separate lines of ancestry.

via Polish nos

Step	Language	Word	Meaning
1	Polish	nos	nose
2	Old Polish	nos	nose
3	Proto-Slavic	nȍsъ	nose
4	Proto-Balto-Slavic	nasús	nose
5	Proto-Indo-European	néh₂s-	nose, nostril

via Polish Krzywy

Step	Language	Word	Meaning
1	Polish	Krzywy	crooked
2	Old Polish	krzywy	—

Every word from Proto-Indo-European néh₂s- →Every word from Proto-Balto-Slavic nasús →Every word from Proto-Slavic nȍsъ →