 
<translate> Nkebi ahịrịokwu dị mkpa n'amaokwu ahụ bụ: Dọkịta ahụ lụrụ River n'ebe ahụ ma gwa ya okwu na ntị, na-ekwupụta na ọ gwara ya aha ya. Ya mere, azịza ikpeazụ bụ aha ya. <eng> The relevant sentence in the passage is: The Doctor marries River on the spot and whispers in her ear, declaring that he told her his name.
So, the final answer is his name. 