A Sigeberht was the son of Sæward, who was slain in battle against forces from Wessex in 623(?), and father of later king Sighere, but Yorke thought it more likely this was his successor, Sigeberht the Good.
Houbo un Sigeberht que era o fillo de Sæward, que morreu loitando contra Wessex en 623(?), e pai dun rei posterior, Sighere, pero Yorke considera que é máis probábel que se trate do seu sucesor, Sigeberht o Bo.