Where does “Johor Bahru” come from?

Johor Bahru (English) comes from Malay Johor Bahru, from Malay Johor, from Arabic جَوْهَر, from Persian گوهر, from Middle Persian gwhl, from Old Persian gauθra.

Ancestry of “Johor Bahru”, step by step

Step	Language	Word	Meaning
1	Malay	Johor Bahru	—
2	Malay	Johor	Johor state in Malaysia
3	Arabic	جَوْهَر	gem, jewel; jewel, pearl; jewels
4	Persian	گوهر	jewel; gem; pearl
5	Middle Persian	gwhl	substance, essence, nature; jewel; stock, lineage
6	Old Persian	gauθra	—

Every word from Old Persian gauθra →Every word from Middle Persian gwhl →Every word from Persian گوهر →