Where does “delapan” come from?

delapan (Indonesian) comes from Malay dĕlapan, from Proto-Malayic dua(ʔ) alap-an — eight.

delapan (Indonesian): eight

Definitions

Step	Language	Word	Meaning
1	Malay	dĕlapan	Obsolete spelling of delapan
2	Proto-Malayic	dua(ʔ) alap-an	eight

delapan — Etymology, Origin & Word History | Etymology Explorer