Caifum

Etymology
From irregular romanization of the  pronunciation of.

Proper noun

 * 1) * 1771, Encyclopaedia Britannica, 1st ed., Vol. II, p. 7:
 * CAIFUM, a city of China, ſituated in the province of Honan, on the river Crocceus, three hundred and fifty miles north-weſt of Nanking...
 * CAIFUM, a city of China, ſituated in the province of Honan, on the river Crocceus, three hundred and fifty miles north-weſt of Nanking...