Noðhelm, or Nunna for short, was King of Sussex, apparently reigning jointly with Watt, Osric, and Æðelstan.
On the same basis (re: genealogy of the later House of Wessex for comparison) Ealdberht, who rebelled against King Ine in 722 and 725 (A-S Chronicles), could have been a contemporary and relative of Aethelberht.
[1] Nothgyth was granted land to build a minster, and in the charter it states that she promised to be Bishop Wilfrid's nun and to go on a pilgrimage.
Noðhelm’s last surviving charter, in which he was called Nunna rex Suthsax’, is dated 714, probably in error for 717,[2] so his reign began in or before 692 and ended in or after 717.
Many scholars are of the opinion that the main battle was fought at Langport in Somerset, where King Geraint of Dumnonia was slain (Armes Prydain).