Where does “yhtehös” come from?

yhtehös (Ingrian) comes from Ingrian yks, from Proto-Finnic ükci, from Proto-Uralic ükte — one.

Ancestry of “yhtehös”, step by step

StepLanguageWordMeaning
1Ingrianyksone
2Proto-Finnicükcione
3Proto-Uralicükteone
Every word from Proto-Uralic ükte →Every word from Proto-Finnic ükci →Every word from Ingrian yks →