* NN is the Latin abbreviation for "nomen nescion" or "non nominandus" meaning "name is not known" which is a standard across Europe for genealogy, newspaper reports and court affairs. This is more language neutral and globally acceptable than using the English terms "Miss", "son" or "daughter" in place of an unknown given name. It is also preferable than leaving the given name blank, as it clearly indicates the name is missing.
1. Egbert III "the Great", King of Wessex, f. 784, Wessex, , England d. Ett 19 Nov 838, Winchester, Wessex, England (Alder 54 år) [Far: biologisk] [Mor: biologisk]
[S2983] Ferguson, June, Ferguson-1998, (14 Jun 1998) (Troverdighet: 3).
This lady - the father of Egbert and wife of Ealhmund - is shown by Ferguson to be the daughter of Whitekind, King of Saxons.
[S2984] Fettes, Ian, Fettes-2001, (Feb 2001: Australia) (Troverdighet: 3).
Tompsett, Brian. Royal and Noble Genealogy. (http://www.dcs.hull.ac.uk). Oct 1996 and later. This lady - the father of Egbert and wife of Ealhmund - is shown to be the daughter of Æthelbert. I shall assume this is correct.