Trapobane

"[...] You must know, Sancho, that the army in front of us is led and directed by the great Emperor Alifanfarón, lord of the great Ínsula Trapobane²; the other, marching behind us, belongs to his enemy, the king of the Garamantes, Pentapolín of the Tucked-up Sleeve, so-called because he always enters to battle with a bare right arm." [...] 2. The Greek and Roman name for Sri Lanka.

Part 1 published in 1605, Part 2 in 1615, translated in 2003, Miguel de Cervantes and translated by Edith Grossman, Don Quixote, page 126