co-ruler
Noun
Meaning
co-ruler (plural co-rulers)
Alternative form of coruler
Examples
After Caesar's assassination, Cleopatra and Caesarion returned to Egypt, where she named the child as her co-ruler.
In 1777, she abandoned the idea of expelling Moravian Protestants after Joseph, who was opposed to her intentions, threatened to abdicate as emperor and co-ruler.
Dawson Beales, 183. However, it took more than a year for the Diet of Hungary to accept Francis Stephen as co-ruler.
Once the rebellion was suppressed and the pretender eliminated, George went ahead to co-opt Tamar into government with him and crowned her as co-ruler in 1178.
Despite her love for him and his position as co-ruler, Maria Theresa never allowed her husband to decide matters of state and often dismissed him from council meetings when they disagreed.
Edward, by surviving his co-ruler, would be king by default.