Where does “*cantedon” come from?

*cantedon (Gaulish) comes from Proto-Celtic kantom, from Proto-Indo-European ḱm̥tóm, from Proto-Indo-European déḱm̥ — ten.

Ancestry of “*cantedon”, step by step

StepLanguageWordMeaning
1Proto-Celtickantomhundred
2Proto-Indo-Europeanḱm̥tómhundred
3Proto-Indo-Europeandéḱm̥ten
Every word from Proto-Indo-European déḱm̥ →Every word from Proto-Indo-European ḱm̥tóm →Every word from Proto-Celtic kantom →