I decided to use real princesses and tried to give the son titles that they probably could have been granted upon marriage.
DH:
King Edward Albert Frederick George Andrew Patrick David (b. 1894)
DW:
Princess Victoria Marina of Prussia (b. 1917)
Grand-daugther of Kaiser Wilhelm II by son Prince Adalbert)
DS:
Prince William Edward Victor George (
Prince of Wales) (b. 1940)
DD:
Princess Mary Louise Elizabeth (b. 1942)
DS:
Prince Albert Victor Ferdinand David (b. 1946),
Duke of Edinburgh
DS:
Prince Henry August Christian Victor (b. 1950),
Duke of Sussex
DH:
Prince John Charles Francis,
Duke of
Clarence & Avondale (b. 1905)
DW:
Marie Alexandra Thyra Victoria Louise Carola Hilda (b. 1902)
daughter of Prince Maximilian of Baden (1867–1929) and Princess Marie Louise of Hanover and Cumberland.
DD:
Princess Charlotte Victoria Mary (b. 1928)
DD:
Princess Sophie Augusta Louise (b. 1931)
DS:
Prince Alexander Ernest John George,
Earl of Athlone (b. 1935)