Where does “un” come from?

un (Papiamentu) comes from Kabuverdianu un, from Portuguese um, from Old Portuguese ũu, from Latin ūnus, from Old Latin oinos, from Proto-Italic oinos, from Proto-Indo-European óynos — one; single.

un (Papiamentu): one; a, an

Definitions

  1. one; a, an

Ancestry of “un”, step by step

un traces back through two separate lines of ancestry.

via Kabuverdianu un

StepLanguageWordMeaning
1Kabuverdianuunone; a, an
2Portugueseumone; a, an; The figure or digit "1": one
3Old PortugueseũuMasculine singular indefinite article; a; an
4Latinūnusone, single
5Old Latinoinosone
6Proto-Italicoinoscardinal number 1 Previous: n/a Next: *duō;...
7Proto-Indo-Europeanóynosone; single

via Spanish uno

StepLanguageWordMeaning
1Spanishunoone
2Old Spanishunoone
Every word from Proto-Indo-European óynosEvery word from Proto-Italic oinosEvery word from Old Latin oinos