Where does “Khamis” come from?

Khamis (Malay) comes from Malay خميس, from Arabic الخَمِيس.

Ancestry of “Khamis”, step by step

Step	Language	Word	Meaning
1	Malay	خميس	—
2	Arabic	الخَمِيس	—

Khamis — Etymology, Origin & Word History | Etymology Explorer