震旦

Etymology
First attested in the 3rd–4th centuries.

Borrowed from, or a name etymologically related; compare 🇨🇬, 🇨🇬, 🇨🇬, 🇨🇬.

Folk etymology interprets the this word orthographically, as a compound of +, in reference to China's eastward position relative to India. For example, the Buddhist reference work Collection of Meanings and Terms in Translation (翻譯名義集) has the following passage on the origin of this term:

More discussion on the etymology of Zhèndàn can be found in Notes on Marco Polo (Vol. 1).