John* (1St Baron) Marshall
He died in 1164.¹ 

 Sibyl* Devereux

 JOHN MARSHALL
JOHN was born in 1144.¹   He died at the age of 50 in 1194.¹ 

 William* (Lord) Marshall
William* (Lord) was born in 1146 in Pembroke, Pembrokeshire, Wales.¹   He died at the age of 73 on May 14th, 1219 in Caversham Manor, England.¹ 

 MARGARET MARSHALL
MARGARET was born about 1160 in Wiltshire, England.¹   She died after 1242.¹