Where does “eis” come from?

eis (Papiamentu) comes from Dutch ĳs, from Middle Dutch ĳs, from Old Dutch īs, from Proto-West Germanic īs, from Proto-Germanic īsą, from Proto-Indo-European h₁eyH- — ice, frost.

eis (Papiamentu): ice

Definitions

Ancestry of “eis”, step by step

Step	Language	Word	Meaning
1	Dutch	ĳs	ice frozen liquid, notably water
2	Middle Dutch	ĳs	ice
3	Old Dutch	īs	—
4	Proto-West Germanic	īs	ice
5	Proto-Germanic	īsą	ice
6	Proto-Indo-European	h₁eyH-	ice, frost

Every word from Proto-Indo-European h₁eyH- →Every word from Proto-Germanic īsą →Every word from Proto-West Germanic īs →