Occupations have been a soruce of a great many Polish surnames. Some of the more common ones include Bednarz (cooper), Kowal (smith), Stelmach (cartwright), Piekarz (baker), Tokarz (lathe-operator), Kościelny (sexton), Woźnica ( wagon-driver, coachman), Piwowar (brewer), Kołodziej (wheelwright), Stolarz (cabinet-maker), Pilarz, Tracz (sawyer), Cieśla (carpenter), Kucharz (cook), Rybak (fisherman), Krawiec (taylor), Tkacz (weaver), Flisak (raftsman), etc.
Each oif them gave rise to a numebr of spin-offs such as Bednarski, Bednarowicz, Bednarczyk, Bednarkiewicz, Stelmachowski, Stelmachowicz, Stelmasiak, Stelmaszczyk, etc.
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Of course, not just in Polish.
Think "Smith," "Cooper," "Baker," "Driver," "Wright," "Fisher," "Sawyer," "Carpenter," etc.
And then there were the place names that became surnames: "Leonardo da Vinci" comes to mind.
Andrzej in SoCal.