John  (The Marshall) Fitz Gilbert
John  (The Marshall) was born in 1105 in Pembroke, Wales.  He died at the age of 60 in 1165.

 Sibella (Sibyl) Unknown
Sibella (Sibyl) was born in 1139 in Pembroke, Wales.

 Margaret Fitz Gilbert
Margaret was born in 1160 in Wiltshire, Eng.  She died after 1242.