H.R.H Edward Duke of York was the elder child of  King to be George V & Queen Mary,  George Reigned from 1910 to 1936 when Edward was in line to succeed his father after his death, 

which he did but due to his intention to Marry Wallace Simpson, an American divorcee he was forced to choose one or the other

& he chose Love over Royal Duty, abdicating just under I year later.                                                                 Ref.1889

H.R.H.Edward Duke of York Ref.1889 C.19