Where does “ジャマイカ” come from?

ジャマイカ (Japanese) comes from English jamaica, from Spanish jamaica, from Taíno Xaymaca — land of wood and water.

Ancestry of “ジャマイカ”, step by step

Step	Language	Word	Meaning
1	English	jamaica	roselle
2	Spanish	jamaica	roselle
3	Taíno	Xaymaca	land of wood and water

ジャマイカ — Etymology, Origin & Word History | Etymology Explorer