Morkus from Orkus
He isn't a demigod any longer, though. The way the DMG is written, the power level of demigod is for those scions of mortals and gods that remain at that level. When promoted the parentage doesn't change, but he's no longer a demigod. He has ascended to full god.A demigod who ascends is still the child of a god and a mortal and so fits the 5e DMG definition of a demigod. A demigod who ascends is now a full god who has domains and grants cleric spells and not a quasi-deity who does not grant cleric spells.
Two different ways to read the same text about demigods as being mixed divine mortal heritage beings who are not gods but can ascend and be gods.