Sumatra
来自Big Physics
wiktionary
From Indonesian Sumatera, from Sanskrit समुद्र(samudra, “sea”). Mentioned in the 11th century in Sanskrit as समुद्रभूमि(samudrabhūmi, “land of Sumatra”), gradually replacing the earlier स्वर्नद्वीप(svarnadvīpa).
etymonline
Sumatra
said to be from Sanskrit Samudradvipa "ocean-island." Related: Sumatran.
