Crossword clues for Monarch's rule:DEIGRATIALatin phrase used with the name of a monarch ruling by a divine mandateQUEENREGENTFemale monarch ruling on behalf of anotherREIGNMonarch's ruleHENRYIIIFirst monarch to rule England for 50+ yearsANNEFirst monarch to rule over Great BritainREIGNSRules as a monarch