二（er）
Name meaning
二 (er) means two, 2 or (Beijing dialect) stupid.
Practical naming use
Use 二 (er) when the name should suggest two, 2. Keep the full two-character name natural, readable and balanced for everyday use.
Pairing guide
Pair 二 (er) with characters such as 安 (An) for a steadier frame, 文 (Wen) for a cultured register, 清 (Qing) for clarity or 宁 (Ning) for calm. Let the second character clarify the intended register rather than doubling an already strong image.