Prince regent - Wikipedia
https://en.wikipedia.org/wiki/Prince_regent
WEBA prince regent or princess regent is a prince or princess who, due to their position in the line of succession, rules a monarchy as regent in the stead of a monarch, e.g., as a result of the sovereign's incapacity (minority or illness) or absence (e.g., by remoteness, such as exile or long voyage, or the absence of an incumbent).
DA: 6 PA: 75 MOZ Rank: 88