Where does “johari” come from?

johari (Swahili) comes from Arabic جَوْهَر, from Persian گوهر, from Middle Persian gwhl, from Old Persian gauθra.

johari (Swahili): jewel

Definitions

Step	Language	Word	Meaning
1	Arabic	جَوْهَر	gem, jewel; jewel, pearl; jewels
2	Persian	گوهر	jewel; gem; pearl
3	Middle Persian	gwhl	substance, essence, nature; jewel; stock, lineage
4	Old Persian	gauθra	—

johari — Etymology, Origin & Word History | Etymology Explorer