Question:  Princess Alexandra of Hanover is the only child of the Duke of what areas?
Sentence (from "Princess Alexandra of Hanover (born 1999)"): Princess Alexandra of Hanover (Alexandra Charlotte Ulrike Maryam Virginia; born 20 July 1999) is the only child of Princess Caroline of Monaco and Prince Ernst August, heir to the throne of the defunct Kingdom of Hanover.
Relevant evidence: Yes