Question: Who was Prince Hisahito of Akishino's great grandmother?
Sentence (from "Prince Hisahito of Akishino"): Prince Hisahito of Akishino (悠仁親王 , Hisahito Shinnō , born 6 September 2006) is the youngest child and only son of Fumihito, Prince Akishino and Kiko, Princess Akishino.
Relevant evidence: Yes