Richard Bertram
Richard was born about 1076 in Normandy, France.

 Sigel Mitford
Sigel was born about 1080 in Mitford, Northumberland, England.  Sigel is no longer alive.

 William Bertram
William was born in 1099 in Mitford, Northumberland, England.

 Alexander Bertram
Alexander was born about 1104.