Where does “buteen” come from?

buteen (Dutch) comes from Dutch één, from Middle Dutch êen, from Old Dutch ēn, from Proto-West Germanic ain, from Proto-Germanic ainaz, from Proto-Indo-European óynos — one; single.

buteen (Dutch): butene

Definitions

butene

Ancestry of “buteen”, step by step

Step	Language	Word	Meaning
1	Dutch	één	one
2	Middle Dutch	êen	a indefinite article
3	Old Dutch	ēn	—
4	Proto-West Germanic	ain	one
5	Proto-Germanic	ainaz	one; some
6	Proto-Indo-European	óynos	one; single

Every word from Proto-Indo-European óynos →Every word from Proto-Germanic ainaz →Every word from Proto-West Germanic ain →