Herbert FitzHerbert II
Herbert was born in 1120 in Gloucester, England.  He died at the age of 85 in 1205.

 Lucy of Hereford Lady of Blaen Llyfni
Lucy of Hereford Lady of Blaen was born in 1136 in Gloucester, England.

 Herbert Fitzpiers
Herbert was born in 1160.

 Matthew Fitzpiers
Matthew was born in 1164.

 Peter FitzHerbert
Peter was born in 1170.