Where does “semana,setmana” come from?

semana,setmana (Old Spanish) comes from Latin septimāna, from Latin septimānus, from Latin septimus, from Latin Septem, from Proto-Italic septem, from Proto-Indo-European septḿ̥ — seven.

Ancestry of “semana,setmana”, step by step

Step	Language	Word	Meaning
1	Latin	septimāna	week
2	Latin	septimānus	of or pertaining to the seventh in a series
3	Latin	septimus	seventh
4	Latin	Septem	seven; 7
5	Proto-Italic	septem	seven
6	Proto-Indo-European	septḿ̥	seven

Words derived from “semana,setmana”

سيمانة
ssimana

Every word from Proto-Indo-European septḿ̥ →Every word from Proto-Italic septem →Every word from Latin Septem →