William FitzPiers  Earl von Essex

¹   William FitzPiers  Earl's father was Geoffrey FitzPiers  Earl von Essex and his mother was Beatrice De Say.  His maternal grandfather was William De Say. He had a brother and a sister, named Geoffrey and Maud. He had a half-brother and two half-sisters, named John, Cicely and Hawise.  He died in 1228.¹