Thats is cool! Thanks for sharing. I'm surprised they don't use "matahari" for Sunday then as well? BTW Sunday in my native Estonian is "pühapäev" which in literal translation means "holy day"

Kontext

Wah I see that you don’t just know Latin n Greek! 

cryotosensei

Stacker Saloon

saloon

There are a few other Indonesian etymologies I really like:

Orangutan (one of the few words English borrowed) Orang=person hutan=Forest. Person of the forest.
Matahari = Sun, Mata=eye. Hari=Day. Eye of the day.