Sigeheard was joint king of Essex

Essex

Essex is a ceremonial and non-metropolitan county in the East region of England, and one of the home counties. It is located to the northeast of Greater London. It borders with Cambridgeshire and Suffolk to the north, Hertfordshire to the west, Kent to the South and London to the south west...

 along with his brother, Swaefred

Swaefred of Essex

Swaefred was joint king of Essex along with his brother, Sigeheard, from 694 to 709, succeeding their father Sebbi.In 705, they became estranged from King Ine of Wessex for sheltering his rivals to the throne. At the Synod of Brentford, they agree to banish them from Essex in return for King Ine...

, from 694 to 709, succeeding their father Sebbi

Sebbi of Essex

Sebbi was the joint King of Essex from 664 to 683 along with his brother, Sighere. After Sighere died, Sebbi became sole ruler of Essex until 694....

.

In 705, they became estranged from King Ine

Ine of Wessex

Ine was King of Wessex from 688 to 726. He was unable to retain the territorial gains of his predecessor, Cædwalla, who had brought much of southern England under his control and expanded West Saxon territory substantially...

 of Wessex

Wessex

The Kingdom of Wessex or Kingdom of the West Saxons was an Anglo-Saxon kingdom of the West Saxons, in South West England, from the 6th century, until the emergence of a united English state in the 10th century, under the Wessex dynasty. It was to be an earldom after Canute the Great's conquest...

 for sheltering his rivals to the throne. At the Synod of Brentford

Brentford

Brentford is a suburban town in west London, England, and part of the London Borough of Hounslow. It is located at the confluence of the River Thames and the River Brent, west-southwest of Charing Cross. Its former ceremonial county was Middlesex.-Toponymy:...

, they agreed to banish the rivals from Essex in return for King Ine promising not to attack Essex. The exact chronology of the later years of their rule are uncertain. It isn't known whether they governed together until 709 or if Swaefred died before then.

Sigeheard along with Cenred of Mercia

Cenred of Mercia

Coenred was king of Mercia, now part of England, from 704 to 709. He was a son of the Mercian king Wulfhere, whose brother Æthelred succeeded to the throne in 675 on Wulfhere's death...

 confirmed the purchase of Fulham

Fulham

Fulham is an area of southwest London in the London Borough of Hammersmith and Fulham, SW6 located south west of Charing Cross. It lies on the left bank of the Thames, between Putney and Chelsea. The area is identified in the London Plan as one of 35 major centres in Greater London...

 from Tyrhtel (Thyrtell)

Thyrtell

Tyrhtel was a medieval Bishop of Hereford.Tyrhtel was consecrated in 688 and died between 705 and 710.-External links:*...

, Bishop of Hereford by Waldhere (Waldherus)

Waldherus

Waldhere was an early medieval Bishop of London, England.Waldhere was consecrated in 693. He died between 705 and 716...

, Bishop of London (charter

Anglo-Saxon Charters

Anglo-Saxon charters are documents from the early medieval period in Britain which typically make a grant of land or record a privilege. The earliest surviving charters were drawn up in the 670s; the oldest surviving charters granted land to the Church, but from the eighth century surviving...

 S1785).

In 709, Sigeheard's son Offa

Offa of Essex

Offa was King of Essex until 709, when he abdicated in order that he may take up life in a monastery in Rome along with Cenred, King of Mercia. He was the son of Sigeheard of Essex, and, according to some sources, St...

 was briefly joint ruler of Essex and succeeded them as ruler of Essex, but he later abdicated and traveled with King Cenred of Mercia

Mercia

Mercia was one of the kingdoms of the Anglo-Saxon Heptarchy. It was centred on the valley of the River Trent and its tributaries in the region now known as the English Midlands...

 to Rome

Rome

Rome is the capital of Italy and the country's largest and most populated city and comune, with over 2.7 million residents in . The city is located in the central-western portion of the Italian Peninsula, on the Tiber River within the Lazio region of Italy.Rome's history spans two and a half...

.