Current form has been in use since the 19th century, and the word Kock either comes from the nast name or a nickname Kot (a person named so founded the town), or from a plant called kocanka (Helichrysum arenarium), which grows abundantly in the area.
Helichrysum | Sprig of “Gnaphalium arenarium” (=''Helichrysum arenarium | Helichrysum rosulatum | Helichrysum arenarium |
Helichrysum species are used as food plants by the larvae of some Lepidoptera species including the bucculaticid leaf-miners Bucculatrix gnaphaliella (which feeds exclusively on Helichrysum arenarium) and Bucculatrix helichrysella (feeds exclusively on H. italicum) and the Coleophora case-bearers C. caelebipennella, C. gnaphalii (feeds exclusively on H arenarium) and C. helichrysiella (feeds exclusively on H. italicum).