Where does “琅勃拉邦” come from?

琅勃拉邦 (Chinese) comes from Lao ຫຼວງພຣະບາງ.

Ancestry of “琅勃拉邦”, step by step

Step	Language	Word	Meaning
1	Lao	ຫຼວງພຣະບາງ	—