Where does “ses” come from?

ses (Old Dutch) comes from Proto-West Germanic sehs, from Proto-Germanic sehs, from Proto-Indo-European swéḱs — six.

Ancestry of “ses”, step by step

StepLanguageWordMeaning
1Proto-West Germanicsehssix
2Proto-Germanicsehssix
3Proto-Indo-Europeanswéḱssix

Words derived from “ses”

Every word from Proto-Indo-European swéḱs →Every word from Proto-Germanic sehs →Every word from Proto-West Germanic sehs →