There is no sign that William made any claims to the throne.
At some point, he had one of his eyes removed, probably in an attempt to prevent him from making a claim to the throne.
Thus several people could still make competitive claims to the throne.
But other than this declaration he made no active claim to the French throne.
At the entrance to the tent, he knelt to make obeisance to the throne.
He did not make any claim himself, at least in public, to the throne of Gwynedd.
In 166, he was made the first heir to the throne of his father's.
The king's death also made him technically one of candidates to the Swedish throne.
They have to be made to pledge to the throne.
Don's death made John, despite his troubles, the most likely heir to the throne.