Reign is associated with the meaning “To rule or hold royal power” — a beautiful sentiment to see brought to life in your child’s room.
Reign comes from the Old French word reigne and the Latin regnare, meaning "to rule" or "to hold power." It is directly connected to the concept of a monarch's rule over a kingdom. The word entered the English language around the 13th century and was used as a common noun long before it became a given name.