Title : King of Essex
Reign : 664 – 683
Spouse : Osyth, daughter of Firthwood, sub-king of Mercia
Joint king with Sebbi.
Sighere and Sebbi were cousins of the previous king Swithhelm. Sighere returned to paganism while Sebbi remained Christian. A strong rivalry soon developed between the two with Sighere finding an ally in Wessex and Sebbi with Mercia.
King Wulfhere of Mercia took advantage and established himself as overlord in Essex. As part of this Sighere married Wulfhere’s niece Osyth, daughter of Firthwood, a sub-king of Mercia in Surrey.