Where does “Parahiyangan” come from?

Parahiyangan (Indonesian) comes from Sundanese Parahiyangan, from Sundanese rahyang, from Old Javanese ra-, from Proto-Malayo-Polynesian *daₐ.

Ancestry of “Parahiyangan”, step by step

StepLanguageWordMeaning
1SundaneseParahiyangan—
2Sundaneserahyang—
3Old Javanesera-oblique case marker for common nouns
4Proto-Malayo-Polynesian*daₐ—
Every word from Proto-Malayo-Polynesian *daₐ →Every word from Old Javanese ra- →Every word from Sundanese rahyang →