In speculative fiction or gaming, "Below" often refers to underworld settings or hidden civilizations (e.g., Hollow Knight or Underale style lore). "Sovereign Below" could refer to a ruler of a subterranean realm.
The word "Sovereign" refers to supreme power or authority, often used to describe a monarch or an independent state. Souvren Below
Given the phrasing, it is likely a stylized reference to "Sovereign" or "Sovereignty," or perhaps a specific creative project (like a niche indie game, music track, or fictional lore) that has not yet reached broad public documentation. Potential Interpretations In speculative fiction or gaming, "Below" often refers