Where does “soixantième” come from?
soixantième (French) comes from French soixante, from Old French soissante, from Latin sexāgintā, from Proto-Indo-European sweḱsḱomt, from Proto-Indo-European swéḱs-dḱomt — six-ten.
soixantième (French): sixtieth
Ancestry of “soixantième”, step by step