Siward Earl of Northumbria
Siward Earl of was born in 0984.

 Alefbed of Bernica
Alefbed of was born in 0997.  Alefbed of is no longer alive.

 Sibyl Fitzsiward
Sibyl was born in 1014 in Northumberland, England.  She died at the age of 26 in 1040.

 Waltheof Earl of Northumbria
Waltheof Earl of was born in 1016.  He died at the age of 60 in 1076.