[Belegorn]

Dior would probably be granted that same choice as the children of Elrond since they are all of the same line, just as his child [Elrond's mother Elwing] was given the choice. However, he was king of the Elves. Would his situation be like other children of Elves and mortals? In other words, how did they age, how were they different from Men, and from Elves, how the same? I would assume something like Galador. However, he was born after Lúthien became mortal. Even still, Elves flocked to him as Lord of Doriath. Or maybe he was more like to the sons of Elrond than to the mortal Lord of Dol Amroth. I would assume Dior would be included among the half-Elven since Elrond and Elros, as well as Elwing were referred to as such.