'封号' literally combines 封 (fēng), meaning 'to confer' or 'to bestow', and 号 (hào), meaning 'title', 'name', or 'designation'. Historically, it referred to formal titles granted by emperors to nobles, officials, or even deities—such as 'Duke of the Eastern Sea' or 'Guardian of the Five Peaks'. These titles carried honorific weight and often reflected rank, virtue, or divine function.

In modern usage, 封号 has taken on a digital life: it commonly means 'online account name' or 'user handle', especially in gaming, social media, and forums. Though less formal than its imperial roots, this usage preserves the idea of a bestowed, distinctive identifier—something chosen or assigned to represent a person’s identity in a specific domain. It is not used for everyday personal names or legal names, but rather for ceremonial, official, or virtual naming contexts.