Where does “unu” come from?

unu (Papiamentu) comes from Spanish un, from Old Spanish un, from Old Spanish uno, from Latin ūnus, from Old Latin oinos, from Proto-Italic oinos, from Proto-Indo-European óynos — one; single.

unu (Papiamentu): one

Definitions

Ancestry of “unu”, step by step

unu traces back through two separate lines of ancestry.

via Spanish un

Step	Language	Word	Meaning
1	Spanish	un	Apocopic form of uno one; a
2	Old Spanish	un	an; a masculine singular
3	Old Spanish	uno	one
4	Latin	ūnus	one, single
5	Old Latin	oinos	one
6	Proto-Italic	oinos	cardinal number 1 Previous: n/a Next: *duō;...
7	Proto-Indo-European	óynos	one; single

via Kabuverdianu un

Step	Language	Word	Meaning
1	Kabuverdianu	un	one; a, an
2	Portuguese	um	one; a, an; The figure or digit "1": one
3	Old Portuguese	ũu	Masculine singular indefinite article; a; an

Every word from Proto-Indo-European óynos →Every word from Proto-Italic oinos →Every word from Old Latin oinos →