William de Bertram
William was born before 1140.

 Hawise de Baliol
Hawise was born before 1140.

 Roger de Bertram
Roger was born before 1155.  He died after 1172.

 Richard de Bertram
Richard was born before 1175.  He died in 1176.

 Guy de Bertram
Guy was born before 1190.

 William II de Bertram
William II was born before 1190.

 Veredus de Bertram
Veredus was born about 1193.