Where does “sittembri” come from?

sittembri (Sicilian) comes from Latin september, from Latin Septem, from Proto-Italic septem, from Proto-Indo-European septḿ̥ — seven.

sittembri (Sicilian): September

Definitions

Step	Language	Word	Meaning
1	Latin	september	of September
2	Latin	Septem	—
3	Proto-Italic	septem	seven
4	Proto-Indo-European	septḿ̥	seven

sittembri — Etymology, Origin & Word History | Etymology Explorer