Aiwass only knew that the last one to die in the curse was the current Prince Andrew. From him onward, there had been no more deaths.
Logically, after the queen's death, the throne should be succeeded by Isabel's father, Prince Albert. He was the first in line to the throne.
Unfortunately, he was a complete washout—at least as far as his royal status was concerned, he was a washout. However, he was also a good person.
In the game's storyline, before the queen's assassination, when he heard that he might have to succeed to the throne, he immediately sneaked away.
Of course, saying he ran away might not be entirely accurate.
Specifically, he went off to enjoy the mountains and streams.
Just like Isabel, Prince Albert also lacked adaptability to the Path of Authority. As a result, even though he was nearly fifty years old this year, he only possessed second-level Authority Force.