China has not many surnames I think? A little google search showed that dang is one of them. ``` Chinese : The surname Dang comes from a branch of the ruling family of the Zhou dynasty (1122–221 bc) that spread to the state of Jin and the state of Lu. The character now also means 'political party'. German: from an old personal name Tanco, a cognate of modern German denken 'to think', Gedanke 'thoughts'.

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So I'm guessing if you're from a country where that is a regular surname, you might assume it's like that and not DanG, so yeah I guess that happens