King / Queen succession [Game of Thrones spoilers]

Not quite what the OP was asking, but there is the example of Catherine the Great of Russia, who took over from her infant nephew and his mother who was acting as regent.

Maybe, maybe not. Yes, Charlotte would have die without any surviving children for this scenario to play out, but that wasn’t exactly unknown. Her uncle’s wife Queen Adelaide, for example, had at least four pregnancies, resulting in stillborn twins, a girl who died the day she was born, another girl who lived less than three months, and at least one miscarriage. I think the record-holder was probably Queen Anne a century earlier: seventeen known pregnancies, no surviving heirs.

Dowager Queen Sunwon in Korea managed to become Grand Queen Regent to her grandson, filling in for the absent generation .

So she was Queen Consort, and then Queen Mother, effectively retirement, and returned to being an active Queen , as Queen Regent . Although as Queen Regent her 11 year old grandson was technically the monarch, it fits as a return to a very similar role after the next generation died out leaving no one so the Dowager Queen filled the place as an adult monarch.

So if Charles had been born before George VI (grandpa) died, would he as next male heir become king instead? And then if he died childless before mumsie…

Charles was born in 1948; George VI died in 1952. No, Charles’s mother always preceded him in the line of succession.

JaI’m is also a member of the Kingsguard, who are, by virtue of that office, disinherited. (Of couse, they’re also supposed to be celibate, but…)

Not only that but Britain never had a king named Adam or Cain.