Where does “یکم” come from?

یکم (Persian) comes from Persian یک, from Middle Persian ʾywk', from Middle Persian ʾy, from Proto-Iranian Háywah, from Proto-Indo-Iranian Háywas, from Proto-Indo-European óynos — one; single.

یکم (Persian): first

Definitions

  1. first

Ancestry of “یکم”, step by step

یکم traces back through two separate lines of ancestry.

via Persian یک

StepLanguageWordMeaning
1PersianیکAPI •; one
2Middle Persianʾywk'
3Middle Persianʾy
4Proto-IranianHáywahone
5Proto-Indo-IranianHáywasjust, only; one
6Proto-Indo-Europeanóynosone; single

via Persian ـم

StepLanguageWordMeaning
1PersianـمFirst-person singular possessive suffix
Every word from Proto-Indo-European óynosEvery word from Proto-Indo-Iranian HáywasEvery word from Proto-Iranian Háywah