Borneo
来自Big Physics
wiktionary
Probably from Sanskrit वरुणद्वीप(varuṇa-dvīpa, “island of Varuna”).
etymonline
Borneo
large island in Indonesia, from Portuguese alteration of Brunei, which is today the name of a sultanate on the island. This is Hindi and probably ultimately from Sanskrit bhumi "land, region." Related: Bornean.