| prev, German Crown Princess and Crown Princess of Prussia
Countess of Castell-Rüdenhausen, Duchess Friedrich August of Oldenburg
|Spouse|| Prince Louis Ferdinand Sr of Prussia (m. 1975; d. 1977) |
Duke Friedrich August of Oldenburg (m. 1991-2015)
| Georg Friedrch, King of Prussia |
Princess Cornelie-Cecile of Prussia
|House|| House of Castell-Rüdenhausen (by birth) |
House of Hohenzollern (by marriage)
|Father||Siegfried, 4th Prince of Castell-Rüdenhausen|
|Mother||Countess Irene of Solms-Laubach|
|Born||20 June 1950|
|Died||5 September 2015 (aged 65)|
Donata, Countess of Castell-Rüdenhausen and Duchess Friedrich August of Oldenburg (Donata Emma; born 20 June 1950 - 5 September 2015) is the late mother of Georg Friedrich, King of Prussia, the current head of the House of Hohenzollern and Princess Cornelie-Cecile of Prussia.
She was a member of German nobility. As the daughter of Siegfried, 4th Prince of Castell-Rüdenhausen and (1916–2007), head of the Rüdenhausen branch of the House of Castell and his wife Countess Irene of Solms-Laubach (1925-2006).