Simon III DE SENLIS, Earl Of Northampton & Huntingdon 
- Born: 1138, Warkworth, Northamptonshire, England
- Marriage: Alice DE GAND 
- Died: Jun 1184, Huntingdon, Huntingdonshire, England at age 46
- Buried: Priory Of St Andrew, Northampton, England
Another name for Simon was DE SAINT-LIZ.
Sources, Comments and Notes:
[The family tree between "Adam Saint Liz" and "Simon III de Senlis" is very uncertain]
Source <Dictionnaire de la noblesse ... de France> Par François Alexandre Aubert de la Chenaye Desbois:
"... Simon De Senlis, II. du nom, Comte de Hutingdon & de Northampton, suivit le parti d'Etienne , Roi d'Angleterre, contre la Reine Mahaud & Henri II. son fils. Il mourut l'an 1151, & eut pour femme Isabeau de Beaumont, fille de Robert de Beaumont, I. du nom, Comte de Licestre, & d'Amicie de Norduvic, son épouse, dont il eut
VII. Simon De Senlis , III. du nom, Comte de Hutingdon & de Northampton, mort sans enfans l'an 1184, d'Alix de Gand, Comtesse de Lincoln, son épouse...."
"Simon de Senlis (Saint Liz), III, Earl Of Northampton (c.1145 - 1184)
Birthdate: circa 1145 Birthplace: Warkworth, Northamptonshire, England
Death: Died June, 1184 in Huntingdon, Huntingdonshire, England
Alice de Gaunt, Countess Of Nort... wife
Simon De Senlis, IV son
Simon Saint Liz son
Simon II de Senlis, 4th Earl of ... father
Isabel (Elizabeth) de Beaumont mother"
"SIMON de Senlis (-Jun 1184, bur St Andrew's Priory). The Vita et Passio Waldevi Comitis names "Simonem de Senliz tercium et duas filias…Amicia et Hawisia" as the children of "comes…Simon…[et] Ysabellam comitissam, filiam Roberti comitis Leicestrie". Robert of Torigny records that "Symon filius eius" succeeded on the death in 1153 of "Symone comite Huntedoniæ". He was recognised as Earl of Huntingdon and Northampton in 1174. "Simon comes de Norhamtonia" donated property to Ramsey Abbey, Huntingdonshire by charter dated 28 Mar 1175, witnessed by "Simon fratre comitis…".
m ALICE de Gand, daughter of GILBERT de Gand Earl of Lincoln & his wife Rohese de Clare (-1238, bur Bridlington). Robert of Torigny records that "filiam eius unicam [Gisleberti de Gant]" married "Symon iuvenis filius comitis Symonis. The Stemma fundatoris of Bardney Abbey names "Aliciam" as the daughter of "Gilbertus", adding that she married "Simon de Monteforti comes Noramtoniæ". A manuscript genealogy of the Gant family names "Aliciam" as the daughter of "Gilbertus", adding that she married "Simoni de sancto Licio, comiti Huntingtoniæ et Northamptoniæ", died childless, and was buried "apud Bredlinton". "A. comitissa Norhamtunie filia Gilleberti comes Lincolnie" confirmed the donation of land in Scampton to Kirkstead abbey by "Radulfus filius Gilleberti", for the health of "sponsi mei Simonis comitis", by charter dated to early in the reign of King Henry II. Simon & his wife had two children:
a) GUNNOR . The Stemma fundatoris of Bardney Abbey names "Gonorram" as the daughter of "Simon de Monteforti comes Noramtoniæ" and his wife Alice, adding that she died without heirs.
b) SIMON de Senlis (-young). "Simon de sancto Licio frater comitis Symonis" donated property to the Abbey of De la Pre, Northamptonshire, for the soul of "Symonis nepotis mei", by undated charter witnessed by "comitissa Adelyz de Gaund…"
Source <A Genealogical and Heraldic History of the Commoners of Great ..., Volume 1> Par John Burke:
"... Simon De St. Liz, Earl of Northampton, ... He had married Isabel, daughter of Robert de Bellomont, called " Le Bossu," ... his lordship had a son, inter alios,
Simon De St. Liz, who granted, by the description of "Symon de Sancto Licio, frater Comitis Symonis," a meadow in Cumton to the nuns of Delapre (Mon. Angl. I. 1017, and II. 264). By Amicia, his wife, he was father of
Sir Simon De St. Liz, knt. ..."
Simon married Alice DE GAND  [MRIN: 1444], daughter of Gilbert DE GAND, Comte De Lincoln & Lord De Folkingham  and Rohaise DE CLARE . (Alice DE GAND  was born in , , England, died in 1185 in , , England and was buried in Bridlington, Yorkshire, England.)