Simon de Senlis Earl of Huntingdon and Northampton ^{1 2}

   Other names for Simon were Simon de St. Liz and Simon de Senliz Earl of Huntingdon and Northampton.

  Research Notes:

Crusader, son of Ranulph the Rich, a Norman.

From Wikipedia - Simon I de Senlis, Earl of Huntingdon-Northampton :

Simon I of St Liz, 1st Earl of Northampton and 1st Earl of Huntingdon[1] (died 1109) was a Norman nobleman.

He built Northampton Castle and the town walls[2]. He also built one of the three remaining Round churches in England , the The Holy Sepulchre , Sheep Street, Northampton ).

Family
He married Maud, 2nd Countess of Huntingdon . Simon de Senlis, 4th Earl of Northampton was their son. A daughter, Maud de St. Liz, married Robert Fitz Richard . Waltheof of Melrose was also a son.

Simon married Maud of Huntingdon, daughter of Waltheof II Earl of Northumberland and Judith of Lens, about 1090. (Maud of Huntingdon was born about 1074 and died in 1131.)