那么

In Chinese, '那么' (nàme) is commonly used in spoken language and texts as a conjunction word, similar to 'then', 'so', or 'in that case' in English. It usually connects parts of sentences showing sequence, condition, or cause and effect. Using it as a nickname probably reflects that the person could be straightforward in their way of expression and likes using casual, direct ways in communication. But since it's a fairly general term in the language without any special symbolism or specific cultural background, its interpretation greatly depends on the person who chose it.