Where does “Mesir” come from?

Mesir (Malay) comes from Classical Malay مصر, from Arabic مِصْر — Egypt.

Ancestry of “Mesir”, step by step

Step	Language	Word	Meaning
1	Classical Malay	مصر	—
2	Arabic	مِصْر	Egypt

Mesir — Etymology, Origin & Word History | Etymology Explorer